flatorn880

did you set
Enable Error Logging Log error messages to the web server error log.
Enable Debug Logging Log debug messages to the web server error log.

true and watched your server log files?

That it: Disabling Timetable Responsive Schedule For WordPress gets the postie working

I transferred the page to my own server
Calling from postie:
To run the check mail script manually -> [process Emai] is working
mydomain.com?postie=get-mail

PHP Fatal error: Call to undefined function get_current_screen() in /var/..../wp-content/plugins/timetable/post-type-weekdays.php on line 50

running by “Check for mail every:” has no error but no new page

the same here, any ideas?
I can not disable plugins at this time on a working installation.
Maybe I can install a copy next week

Plugins:
Duplicator
Envato WordPress Toolkit
Google Calendar Events
Maintenance
Postie
Sport Core Plugin
Sport Shortcodes Plugin
Sport Widgets Plugin
Timetable Responsive Schedule For WordPress
UpdraftPlus – Backup/Restore
WordPress Importer
WPFront User Role Editor
WP Super Cache
Yoast SEO
YouTube widget
YouTube widget responsive