Mailbox monitoring does not work anymore, after changing the language of the Google account to another language.

If you have created a configuration for Connect To Mail with a Google account, with mail language „english“ and you change it to another language e.g. „german“, it could happen, that Connect To Mail does not find a folder to be monitored. This is because the folder name like „Inbox“ changed to „Posteingang“.

Change Language in Google Global:
Change Language in Google Mail:

To solve this issue, create a new Connect to Mail configuration, or reset the language for Google account/mail-language to the previous language.