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We migrated our site to a new server, and everything including email deliveries are working correctly.

However, we’re encountering this strange issue, where the WP SMTP Settings page is the only page in the admin that gives us this error:

https://drive.google.com/file/d/15Fa_v4OJmm4JoYpgeLRMpX1l3k715CTI/view?usp=sharing

All other pages in our backend and frontend work fine, including this one from this plugin: https://drive.google.com/file/d/1McH-YxYllC0gYWOtgNdIr3WD9pgFfows/view?usp=sharing

Just the settings fail to grant access to any admin

We tried deactivating, and activating the plugin again, updating it to latest version, and no dice.

Any suggestions of how to solve?