I’m not seeing this on any of my cameras. Can you please provide more details: camera type, FW version (if you know it), app version, phone OS.
A -90 code doesn’t necessarily mean Wyze’s servers are having issues.
Here’s the connectivity troubleshooting guide:
If that doesn’t solve it, keep in mind that this is primarily a user-to-user forum. If you don’t get help here from the community, file a support ticket, preferably from within the app while the bad camera is selected. That will ensure that the logs are captured. You might want to submit the ticket right away because there’s somewhat of a backlog. You can always let them know it’s already resolved when they contact you.