For 99.9% of the sites, my icap services are working, There instances where I am getting the following icap error. Not sure as to how to start debugging it. I am using the latest squid and icap versions. The following error was encountered while trying to retrieve the URL: https://www.flowroute.com/accounts/login/ ICAP protocol error. The system returned: [No Error] This means that some aspect of the ICAP communication failed. Some possible problems are: The ICAP server is not reachable. An Illegal response was received from the ICAP server. Thanks in advance