If your app uses dynamic query parameters or subpaths, enable regex matching.
This validation is a critical security feature to prevent , where an attacker could redirect a user to a malicious site after authentication. If your app uses dynamic query parameters or
Edit deployment.toml (WSO2 IS 5.11.0+):
WSO2 allows query parameters in callbacks, but they must match . for WSO2 API Manager
The error can occur in multiple OAuth2 grant types: check under in the Dev Portal.
Alternatively, for WSO2 API Manager, check under in the Dev Portal.