Hello,
there is an error while trying to delete a custom field. I assume it happens on the plugin versions #0 D:xampphtdocsprojeqtor942pluginscreenCustomizationscreenCustomizationSaveField.php (813) -> getDatabaseTableName()
2022-02-18 12:43:32.498 ===== TRACE ===== Cron started at 18/02/2022 12:43:32
2022-02-18 12:44:10.087 ** ERROR ** [V9.4.2] EXCEPTION **
2022-02-18 12:44:10.091 ** ERROR ** [V9.4.2] on file 'D:xampphtdocsprojeqtor942modelpersistenceSqlElement.php' at line (3814)
2022-02-18 12:44:10.095 ** ERROR ** [V9.4.2] cause = Call to undefined method IncomingMail::getDatabaseTableName()
2022-02-18 12:44:10.098 ** ERROR ** [V9.4.2] => #0 D:xampphtdocsprojeqtor942pluginscreenCustomizationscreenCustomizationSaveField.php (813) -> getDatabaseTableName()
2022-02-18 12:46:38.244 ** ERROR ** [V9.4.2] EXCEPTION **
2022-02-18 12:46:38.250 ** ERROR ** [V9.4.2] on file 'D:xampphtdocsprojeqtor942modelpersistenceSqlElement.php' at line (3814)
2022-02-18 12:46:38.253 ** ERROR ** [V9.4.2] cause = Call to undefined method IncomingMail::getDatabaseTableName()
2022-02-18 12:46:38.256 ** ERROR ** [V9.4.2] => #0 D:xampphtdocsprojeqtor942pluginscreenCustomizationscreenCustomizationSaveField.php (813) -> getDatabaseTableName()
In case ActivityPlanningElementMain.php required for analysis. Please mind there is no such a file in ../projeqtor/model/custom directory. The attachment is from /projeqtor/model.
I think this issue occurs with old Plugin and recent PHP.
Try an install latest version of plugin