I am relatively new to Shopify app development, sorry if my questions look stupid
but today when I tried to continue working on the app I get an error message.
Can someone tell me how to fix this please or what to do next... Thanks
After looking at the image you shared, I was able to use the x-request-id to dig a bit deeper and locate an error response of 401 Unauthorized. Our doc on access tokens (access modes) here goes into more detail about when this type of error would be returned, has more info about online vs offline tokens, as well as links to additional resource related to authentication and OAuth flow. I would suggest generating new authentication details before attempting additional requests - Cheers!