OK, so when you see "server error" -- is this exclusively from the PWA? My long-standing fear with the PWA is that the data gets stale: s "stale", which can produce those errors... solution to the stale data is this button: 
Discussion
Yes - so far just the PWA experience. But it is not frequent (or more than any other wallet TBH). It typically resolves itself. Going forward, I will keep track and try and provide the exact scenario if it reoccurs. Will that help? Also, this is by no means a ding - just trying to make it even better!
Ok, so I just got that error message showing on top of the screen when I opened ridful.com/w.
Seeing this note I clicked that button, closed the browser tab and opened the wallet again. No error message. I previously saw the error on the main wallet page, when browsing to NWC or the send page. Will report back if the issue returns.
Thanks for the report. You said " just got that error message showing on top of the screen when I opened ridful.com/w."
Can you be specific about what "when I opened ridful.com/w" means... is it possible that the page was already open, like maybe in a tab, and you just selected the tab? Or did you actually "freshly" navigate to "rizful.com/w"?
Are you using a web browser or the PWA (launch from home screen)? And what kind of device are you on?
thanks