Base64 encoded scanning over rate limiting Cloudflare rules

What is the name of the domain?

dev.mckinsey.id

What is the error number?

Rate limiting for base64 encoded authorisation headers in rate limiting firewall rules.

What is the error message?

Rate limiting for base64 encoded authorisation headers in rate limiting firewall rules.

What is the issue you’re encountering

Rate limiting for base64 encoded authorisation headers in rate limiting firewall rules.

What steps have you taken to resolve the issue?

I want to exempt a particular client id but the headers in the requests are base64 encoded and I haven’t found any function to scan the headers base64 encoded values.