Waf stop filemanager from upload files

While trying to perform action on our cpanel filemanager it failed and return empty , we disabled cloudflare waf and it solved the issue .
We did not know the cause or how to fix it if we want to perform another action.
Kind regards

Hello, I recommend allowlisting the IP using IP Access Rules in the Cloudflare dashboard.

To determine what specific WAF feature is blocking the request, you can search for a blocked or challenged request in the Security app under the Overview tab in the Firewall Events section of your Cloudflare Dashboard.