Starting OneClick console gives
HTTP Status 500
Description: The server encountered an internal error that prevented it from fulfilling this request
If using a custom-branding-config.xml file, check for special characters or language specific characters in any of the parameters. For example, the German "ß" character as in the example below:
Edit the $SPECROOT/custom/console/config/custom-branding-config.xml file and remove the special character causing the issue. Using the above as an example:
Change it to the following:
Then restart tomcat on the OneClick system.