Issue with error_log filling up: class-astra-target-rules-fields.php

I hope someone can help me with this.

The error_log fills up with these lines:
[12-Apr-2023 14:23:53 UTC] PHP Warning: Attempt to read property "post_type" on null in /wp-content/plugins/astra-addon/classes/modules/target-rule/class-astra-target-rules-fields.php on line 1444
[12-Apr-2023 14:23:53 UTC] PHP Warning: Attempt to read property "ID" on null in /wp-content/plugins/astra-addon/classes/modules/target-rule/class-astra-target-rules-fields.php on line 1445

The page I need help with: [log in to see the link]