Hello @entumas,
The recent update should resolve the 2FA issue. I conducted several tests but was unable to replicate the issue using the latest version of the plugin, 1.4.12.
I recommend ensuring that the plugin has been updated successfully to version 1.4.12 on the websites in question and then testing it again. If you’ve modified the admin login page URL using a third-party plugin, please disable it, as such configurations can conflict with the 2FA. Instead, use the Custom Login URL feature available through Security Optimizer.
In case the 2FA issue persists, feel free to re-open this thread and provide us with the exact error message and your WordPress version. Additionally, any details about your website’s setup, especially if it’s custom-configured, could be useful for further troubleshooting.
Best Regards,
Tsvetan Mitev