Hey Guys,
I have a Woocommerce shop (under construction). I got the ‘There was an error getting your inbox.’ immediately after the fresh install. Looked at various places to find a solution but hadn’t. Then I tried to deactivate all the plugins except Woocommerce but still got the error msg. Deactivated Flatsome theme – no luck. Then in cPanel I saw that my active php version was 7.4. (the latest of the 7.x branch). I switched to php 8.2 (also the latest of the 8.x branch) and the error message disappeared.
Please note that the php extension mysqlnd and nd_mysqli are not the same and at my provider the required nd_mysqli extension was turned off by default, so at the first attempt to return to wp I had a crash.
Hope it helps.