Root Cause: Overriding the URI Endpoint with a URI containing a "_" character leads to a mutilated URI.
Update to a fix version listed below or a newer version if available.
A problem has been fixed where an underline character "_" in field URL Endpoint of a REST connection object mutilated the URL.
Fix Status: Released
Component(s): RA Web Service REST
RA Web Service REST Solution 4.2.0 - Available
Use IP address or avoid using underscores in the DNS.