OAI-PMH ListRecords protocol, error: http500, version OJS: 3.1.0.0

I have a problem consulting the oai protocol - ListRecords, it throws the following error: HTTP ERROR 500.

Please help me to solve this problem, This is specs in my serrver

Version OJS: 3.1.0.0

Version PHP: 5.5.21

Version Apache: 2.4.6

Base de datos: PostgreSQL 9.2.24

https://revistas.uis.edu.co/index.php/revistaion/oai?verb=ListRecords&metadataPrefix=oai_dc

Here the errors I found:

[Fri Jul 24 09:08:52.968504 2020] [:error] [pid 11992] [client 186.83.93.151:55998] PHP Fatal error: Call to undefined function getCitations() in /var/www/html/revista/plugins/metadata/dc11/filter/Dc11SchemaArticleAdapter.inc.php on line 201, referer: https://revistas.uis.edu.co/index.php/revistaion/oai

[Fri Jul 24 09:11:34.936147 2020] [:error] [pid 12294] [client 159.69.189.227:48243] PHP Warning: assert(): Assertion failed in /var/www/html/revista/plugins/generic/counter/CounterPlugin.inc.php on line 106

[Fri Jul 24 09:11:41.061790 2020] [:error] [pid 12224] [client 159.69.189.227:23736] PHP Warning: array_map(): Argument #2 should be an array in /var/www/html/revista/plugins/generic/shariff/ShariffPlugin.inc.php on line 115

[Fri Jul 24 09:11:41.061893 2020] [:error] [pid 12224] [client 159.69.189.227:23736] PHP Warning: implode(): Invalid arguments passed in /var/www/html/revista/plugins/generic/shariff/ShariffPlugin.inc.php on line 116

[Fri Jul 24 09:11:45.191405 2020] [:error] [pid 11992] [client 159.69.189.227:57406] PHP Warning: assert(): Assertion failed in /var/www/html/revista/plugins/generic/counter/CounterPlugin.inc.php on line 106

[Fri Jul 24 09:11:46.263277 2020] [:error] [pid 11992] [client 159.69.189.227:57406] PHP Warning: array_map(): Argument #2 should be an array in /var/www/html/revista/plugins/generic/shariff/ShariffPlugin.inc.php on line 115

[Fri Jul 24 09:11:46.263420 2020] [:error] [pid 11992] [client 159.69.189.227:57406] PHP Warning: implode(): Invalid arguments passed in /var/www/html/revista/plugins/generic/shariff/ShariffPlugin.inc.php on line 116

Hi @proyrevistas,

Regarding the Fatal Error:

 PHP Fatal error: Call to undefined function getCitations() in /var/www/html/revista/plugins/metadata/dc11/filter/Dc11SchemaArticleAdapter.inc.php on line 201

That file should not contain any mention of getCitations in OJS 3.1.0-0. Did you get this file from somewhere else or apply modifications to it?

Regards,
Alec Smecher
Public Knowledge Project Team

yes, erase the lines and it worked