RSS Feed/News server error

[ENXF NET]

someone have an idea what is this?

Error: Call to a member function getIdentifier() on null in src/XF/Mvc/Entity/Finder.php at line 1384
XF\Mvc\Entity\Finder->fetch() in src/XF/BbCode/ProcessorAction/AutoLink.php at line 549
XF\BbCode\ProcessorAction\AutoLink::factory()
call_user_func_array() in src/XF/SubContainer/BbCode.php at line 111
XF\SubContainer\BbCode->XF\SubContainer\{closure}() in src/XF/Container.php at line 228
XF\Container->create() in src/XF/SubContainer/BbCode.php at line...

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