I'm seeing this error message randomly without any common way to reproduce it. Sometimes it goes away with a reload and other times it takes a bit longer.
This message only shows up on the corporate network. Once off the network, this error doesn't come up. Zscaler is used for the WAF so maybe that could be causing it.
Anyone seen this type of error before and maybe can offer some guidance on how to resolve this or where to look? The logs within Front Door do not show anything helpful.