List Records OAI Http Error 500

hey guys, please help. I have OJS version, currently there is a problem when I click on the OAI record list, an error message appears as shown in Figure

the following displays the error:

Fatal error: Uncaught Error: Call to a member function getId() on null in /home/pascaban/ Stack trace: #0 /home/pascaban/ OAIDAO->setOAIData(Object(OAIRecord), Array, true) #1 /home/pascaban/ PKPOAIDAO->_doCommonOAIFromRowOperations(Object(OAIRecord), Array) #2 /home/pascaban/ PKPOAIDAO->_returnRecordFromRow(Array) #3 /home/pascaban/ PKPOAIDAO->getRecords(Array, NULL, NULL, NULL, 0, 100, 116) #4 /home/pascaban/ JournalOAI->records('oai_dc', NULL, NULL, NULL, 0, 100, 116) #5 /home/pascaban/ OAI->ListRecords() #6 /home/pascaban/ in /home/pascaban/ on line 184

if I deactivate the Dc folder in plugin > oaimetadaformats the list records will appear as shown below

Link Oai:
Please help where is the error