I cant read or use any gmail or gsuite account anymore.
To help protect your account, Google will soon block apps that don’t comply with Google’s security policies. You can let the app developer (firstname.lastname@example.org) know that this app should stop using unsupported OAuth flows
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@superdejooo - This appears to be resolved in Mailspring 1.10.8-8ea2a61f. I have a regular Gmail and an 0365 Organization Account connected to my Mailspring instance.