SYMPTOM:
“Invalid Server URL” message appears when trying to set Usher configuration through proxy in Strategy Web Administrator page as shown in the image below:

STEPS TO REPRODUCE:

CAUSE:
Strategy Web does not support to use the proxy server for connection to Usher Server. This is a limitation in Strategy Web 9.5.x and 10.x.
ACTION:
Currently this issue is being reviewed by Strategy for a potential code fix on an upcoming Strategy release.