When configuring the AAI reporting server configuration using HTTPS for AAI and the Reporting Server, the error below is seen:
Validation failed on report server: Internal Proxy Error: <html><head><title>Error</title></head><body>Internal Server Error</body></html>
Release : 6.4.6
This can occur if you did not import the the certificate used on the Jasperserver Reporting Server is not imported into the java keystore as documented in the link below: