Depositing Articles in crossref returns 500 error

Application Version - 3.2.0.0

I have successfully generated doi for my articles. On the CrossRef page the status of the articles is Not deposited. I selected all the articles and clicked the deposit button, it returned 500 error:

This page isn’t working

bumj.babcock.edu.ng is currently unable to handle this request.
HTTP ERROR 500

On page https://bumj.babcock.edu.ng/index.php/bumj/management/importexport/plugin/CrossRefExportPlugin/exportSubmissions

I was able to successfully log into crossref with my credentials.
Also confirmed curl is active php.ini

Hi @TSoretire,

Check your PHP error log for details.

Regards,
Alec Smecher
Public Knowledge Project Team

Fatal error : Uncaught Error: Call to a member function saveXml() on null in /home/babcockmj/public_html/classes/plugins/PubObjectsExportPlugin.inc.php:372 Stack trace: #0 /home/babcockmj/public_html/plugins/importexport/crossref/CrossRefExportPlugin.inc.php(219): PubObjectsExportPlugin->exportXML(Array, ‘article=>crossr…’, Object(Journal), true) #1 /home/babcockmj/public_html/classes/plugins/PubObjectsExportPlugin.inc.php(176): CrossRefExportPlugin->executeExportAction(Object(Request), Array, ‘article=>crossr…’, ‘exportSubmissio…’, ‘articles’, true) #2 /home/babcockmj/public_html/classes/plugins/DOIPubIdExportPlugin.inc.php(29): PubObjectsExportPlugin->display(Array, Object(Request)) #3 /home/babcockmj/public_html/lib/pkp/pages/management/PKPToolsHandler.inc.php(104): DOIPubIdExportPlugin->display(Array, Object(Request)) #4 /home/babcockmj/public_html/lib/pkp/classes/core/PKPRouter.inc.php(391): PKPToolsHandler->importexport(Array, Object(Request)) #5 /home/babcockmj/public_html/lib/pkp/classes/core/PKPPageRouter.in in /home/babcockmj/public_html/classes/plugins/PubObjectsExportPlugin.inc.php on line 372

Hi @TSoretire,

See CrossRef exports are empty after upgrade · Issue #5681 · pkp/pkp-lib · GitHub for details and a solution.

Regards,
Alec Smecher
Public Knowledge Project Team

It worked for my OJS installation.

Thank you @asmecher