When does this happen exactly?
If i press the button “Speichern & Optimieren”
Alright, please try the following to debug this issue:
– First, if you’re using a plugin which provides an easy URL redirect feature, check it out to make sure there’s no redirection rule in there that might be interfering with the form submissal URL: https://yoursiteurl.com/wp-admin/options.php?tab=omgf-optimize-settings
– Second, maybe there’s a redirection rule in your Nginx or Apache configuration. Check it out.
– Still no luck? Disable all other plugins, except OMGF. If the issue is resolved, activate each plugin one by one and test after activating each one. When the issue reappears, let me know which plugin you last activated, so I can see if I can provide a compatibilty fix.
– If with all plugins deactivated the issue still arises, try switching to another theme.
Curious towards your findings!