Hi!
It’s probably a false flag (meaning CORS is not the real issue). It happened to many users already, each time it was related to some Xano internal error, please reach them out. If the request is sometimes working and sometimes not then it’s very likely a xano related issue.
Example of another related thread => Network Error in Weweb with Xano - #26 by garcilaso
Also we recently helped a customer with this, by upgrading his xano instance it solved the issue.