Unexpected error occured, please reload and try again. Error pops up when I try to save edited author guidelines

Describe the issue or problem
Please tell us what happens and what you expected to happen.Unexpected error occured, please reload and try again. Error pops up when I try to save edited author guidelines.

Steps I took leading up to the issue
Tried different browsers, but, no solution

What application are you using? OJS 3.3.0.14

Additional information
Error log below:

[29-Jul-2024 11:42:41 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/lib/vendor/smarty/smarty/libs/plugins/modifier.escape.php on line 36
[29-Jul-2024 11:42:41 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/lib/vendor/smarty/smarty/libs/plugins/modifier.escape.php on line 36
[29-Jul-2024 11:43:07 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:07 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:07 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:07 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:07 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:25 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:25 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:25 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:25 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:25 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:40 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:40 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:40 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:40 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:43:40 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 11:50:19 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/lib/vendor/smarty/smarty/libs/plugins/modifier.escape.php on line 36
[29-Jul-2024 11:50:19 UTC] PHP Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/thelsqls/nigeriandentaljournal.ng/cache/t_compile/3c8d2df77da7e70ee92f6ff6f38e095e9326a21e^4dffb64063bb972c37e05619a2ccd9d0ea7473ac_0.app.frontendcomponentsfooter…php on line 57
[29-Jul-2024 11:51:58 UTC] PHP Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/thelsqls/nigeriandentaljournal.ng/cache/t_compile/480451dc2b75b35c64354d7c4cad1157538fd42d^4dffb64063bb972c37e05619a2ccd9d0ea7473ac_0.app.frontendcomponentsfooter…php on line 57
[29-Jul-2024 11:52:14 UTC] PHP Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/thelsqls/nigeriandentaljournal.ng/cache/t_compile/480451dc2b75b35c64354d7c4cad1157538fd42d^4dffb64063bb972c37e05619a2ccd9d0ea7473ac_0.app.frontendcomponentsfooter…php on line 57
[29-Jul-2024 13:03:29 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:03:29 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:03:29 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:03:29 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:03:29 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:50:18 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:50:18 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:50:18 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:50:18 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:50:18 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:51:20 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:51:20 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:51:20 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:51:20 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:51:20 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:51:36 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:51:36 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:51:36 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:51:36 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:51:36 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:45 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:45 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:45 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:45 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:45 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:49 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:49 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:49 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:49 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:49 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:57 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:57 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:57 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:57 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194
[29-Jul-2024 13:55:57 UTC] PHP Warning: Undefined array key “certification” in /home/thelsqls/nigeriandentaljournal.ng/lib/pkp/classes/plugins/PluginGalleryDAO.inc.php on line 194

Issue solved by our journal technical team.

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