[Evolution] OAuth2 secret not found and gmail

[Van Snyder <van snyder sbcglobal net>]

Yesterday I started getting "OAuth2 Secret not found" pop-ups for gmail accounts.

At first, it's just a mostly-empty box with "Login to your Google account and accept conditions in order to access your mail account "gmail:gmail" (and similar messages for other gmail accounts).

There's a URL pane that briefly has a URL in it, but the "image" area in the bottom pane quickly fills with a "Sign in to googlle.com" image in which nothing works. When that happens, the URL is erased. Any keystroke, or a mouse click, erases that box. Pushing the "Cancel" button simply repeats. Closing the pop-up window makes it go away, until I try to read another message.

I was able to triple-click suffiently quickly to pick up the URL and paste it into my browser, where google asked me to allow Evolution to access my account. I clicked "Allow" and it put up another message that said "lease copy this code, switch to your application and paste it there:" and then 62 characters of gibberish that I assume is some kind of randomly-generated password.

I have no idea where to paste that into Evolution. An offer to save a password in my keyring is not presented.

I tried pasting the gibberish into the password box in seahorse for that account, but it didn't change Evolution's behavior.

I'm using Evolution 3.38.3-1 on Debian Buster 10.