@leedsy90 do you have email configured on swiftmailer and also mailbox?
Two screenshots of this two pages can help.. I suggest to cover / hide from the screenshot the first part of the email before the @ .
If you use Gmail you will need maybe activate the two steps. Before activate the two step be sure you have full and update recovery options: email and phone number as described here.
Also, once you activate the two steps, generate and save recovery backup codes in a safe place where no one can access.
Once you done all this steps you will need generate a specific app password than use that password in UVdesk when you configure the email address instead use the Google account password.
Be sure also to not use wrong SSH command.
> > This discussion < < can maybe help.