Unable to load Submission

I’m trying to add a manuscript to the site. But after loading the metadata the process stops.
Server Information
OJS 3.1.2.0
|PHP version|7.2.10|
|Apache version|Apache/2.4.6 (CentOS) mpm-itk/2.4.7-04 OpenSSL/1.0.1e-fips PHP/5.4.16|
|Database driver|mysqli|
|Database server version|5.5.52-MariaDB|

Error.log
[Mon May 06 22:27:39.027705 2019] [cgi:error] [pid 26181] [client 194.28.16.20:49892] AH01215: PHP Warning: Declaration of HypothesisPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /var/www/pl4691_bqf/data/www/soils-journal.ru/plugins/generic/hypothesis/HypothesisPlugin.inc.php on line 67, referer: https://www.google.com/
[Mon May 06 22:27:39.028039 2019] [cgi:error] [pid 26181] [client 194.28.16.20:49892] AH01215: PHP Warning: Declaration of AddThisPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /var/www/pl4691_bqf/data/www/soils-journal.ru/plugins/generic/addThis/AddThisPlugin.inc.php on line 168, referer: https://www.google.com/
[Mon May 06 22:27:39.028732 2019] [cgi:error] [pid 26181] [client 194.28.16.20:49892] AH01215: PHP Warning: Declaration of CoinsPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /var/www/pl4691_bqf/data/www/soils-journal.ru/plugins/generic/coins/CoinsPlugin.inc.php on line 133, referer: https://www.google.com/
[Mon May 06 22:27:39.047977 2019] [cgi:error] [pid 26181] [client 194.28.16.20:49892] AH01215: PHP Warning: Declaration of OpenAIREDAO::setOAI(&$oai) should be compatible with PKPOAIDAO::setOAI($oai) in /var/www/pl4691_bqf/data/www/soils-journal.ru/plugins/generic/openAIRE/OpenAIREDAO.inc.php on line 19, referer: https://www.google.com/
[Mon May 06 22:27:39.058565 2019] [cgi:error] [pid 26181] [client 194.28.16.20:49892] AH01215: PHP Warning: Declaration of CustomBlockPlugin::getBlockContext() should be compatible with BlockPlugin::getBlockContext($contextId = NULL) in /var/www/pl4691_bqf/data/www/soils-journal.ru/plugins/generic/customBlockManager/CustomBlockPlugin.inc.php on line 134, referer: https://www.google.com/
[Mon May 06 22:27:39.059929 2019] [cgi:error] [pid 26181] [client 194.28.16.20:49892] AH01215: PHP Warning: Declaration of DRIVERDAO::setOAI(&$oai) should be compatible with PKPOAIDAO::setOAI($oai) in /var/www/pl4691_bqf/data/www/soils-journal.ru/plugins/generic/driver/DRIVERDAO.inc.php on line 65, referer: https://www.google.com/

Hi @11117,

Continue looking in your log file – those are warning messages, and they’re cosmetic, but they might be hiding an actual error message in their midst.

Regards,
Alec Smecher
Public Knowledge Project Team