The OpenagendaConnector::getData & OpenagendaConnector::getAgendaSettings will throw warnings as attempting accessing object property error on an array.
Warning: Attempt to read property "error" on array in Drupal\openagenda\OpenagendaConnector->getData() (line 71 of modules/contrib/openagenda/src/OpenagendaConnector.php).
Fix the PHP code. When using Drupal\Component\Serialization\Json::decode method, the return value is an array not an object. Then access to element as array instead of object.
When then error dimension i populated, will not display a PHP Warning and will create a log - as expected.
none
none
Seems fixed, partially at least (use of isset), in latest commit: https://git.drupalcode.org/project/openagenda/-/commit/5ee0a27e703547144...
Have been deployed in production for a few months on a high traffic instance without any problem.