I have an "account fetch error 404" while trying to connect with my account via supermetrics for google sheets on a PC. Usually I would have tried to log out from the data sources and reconnect but I don't see the little arrow to access (on the right side of the account) like on my MAC. I will join 2 attachment "view from a PC, without possibility to log out" and "view from my MAC with possibility to log out".
Also, if you have another solution for "account fetch error 404", I'll be happy to hear it.
this is quite strange. Which browser and which version of it are you using on your PC?
Also, if you have another browser installed on your PC, could you please test with that and let us know of the results.