Hallo Pmail Community Support,
I would like to manage a Gmail account using PegasusMail.
Unfortunately, it doesn't work:
Error message: “Error validating Gmail account”
I can access my account in the browser; OAuth2 is enabled in Gmail.

What could be causing Pegasus to generate this error?
Can anyone help me?
Best regards,
Ekkehard Goebel, Nürnberg, Germany
P.S.:
There is no problem with Thunderbird.

I do not recall ever seeing this error. Did it occur after clicking the "Finished" button upon return to Pegasus Mail from logging in to Google?

If you click the Pegasus Mail "GMail" button now, does it show that a GMail profile already exists? If so, use the "Revalidate" which will re-authenticate to Google. If not, try the process again.

It should open a "Sign in with Google" page in your browser on which is shown your gmail account as one you can choose. Selecting it then prompts for your password, which if correct, will be accepted and will then display instructions to return to Pegasus Mail where you then click the "Finished" button.
Note: This process leaves you logged in to Google so you may want to return to Google and sign out if you do not normally stay logged in.

FWIW, I tested a revalidate using in incorrect password and was prompted by Google for a correct one. I could not replicate the "Effor validating GMail account" message.