Description of problem: Horizon is not accessible after upgrading to RHEL 7.4 Version-Release number of selected component (if applicable): OSP11 RHEL 7.4 upgraded from RHEL 7.3 packstack How reproducible: 100% Steps to Reproduce: 1. Install a all-in-one OSP11 on RHEL 7.3 and confirmed the horizon is accessible 2. Upgrade the system to RHEL 7.4 3. Login to the horizon and the following error will output after a few minutes 'Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator at [no address given] to inform them of the time this error occurred, and the actions you performed just before this error.' More information about this error may be available in the server error log. Actual results: Internal Server Error when accessing the horizon Expected results: Horizon should be able to access Additional info:
*** This bug has been marked as a duplicate of bug 1478042 ***