Hi @asmecher,
I have a problem regarding use of OAI in my OJS 320 and just upgraded to 320-1. This error appeared in ojs 320, and I was hoping after I upgraded to 320-1 will be solved, but it is not.
Please help me to solve this problem, This is specs in my serrver
ojs 320-1
php 7.2
MYSQL
Here the errors I found
Fatal error: Uncaught Error: Call to a member function getProperties() on null in /home/u6976116/public_html/ijadis.org/lib/pkp/plugins/oaiMetadataFormats/dc/PKPOAIMetadataFormat_DC.inc.php:31 Stack trace: #0 /home/u6976116/public_html/ijadis.org/plugins/oaiMetadataFormats/dc/OAIMetadataFormat_DC.inc.php(28): PKPOAIMetadataFormat_DC->toXml(Object(Submission), NULL) #1 /home/u6976116/public_html/ijadis.org/lib/pkp/classes/oai/OAI.inc.php(788): OAIMetadataFormat_DC->toXml(Object(OAIRecord)) #2 /home/u6976116/public_html/ijadis.org/lib/pkp/classes/oai/OAI.inc.php(531): OAI->formatMetadata('oai_dc', Object(OAIRecord)) #3 /home/u6976116/public_html/ijadis.org/lib/pkp/classes/oai/OAI.inc.php(85): OAI->ListRecords() #4 /home/u6976116/public_html/ijadis.org/pages/oai/OAIHandler.inc.php(39): OAI->execute() #5 /home/u6976116/public_html/ijadis.org/lib/pkp/classes/core/PKPRouter.inc.php(391): OAIHandler->index(Array, Object(Request)) #6 /home/u6976116/public_html/ijadis.org/lib/pkp/classes/core/PKPPageRouter.inc.php(231): PKPRouter- in /home/u6976116/public_html/ijadis.org/lib/pkp/plugins/oaiMetadataFormats/dc/PKPOAIMetadataFormat_DC.inc.php on line 31