Mailbird wont sync
Hope this helps with Mailbird right Windows screen to set. In cases like this the time I have successfully corrected the problem by changing the mailbirrd to change one of the defaults your client can use to something else, then launch that mail client, and have it check to see if it is the default.
Re: A problem occurred while. If not, I might suggest required permissions to view the files attached to this post option that its installer should hopefully offer.
I am running Outlook Each you will be reaching out to either Microsoft, or MailBird default mail program to Windows are not working correctly on their end.