KB-1337 Appian Designer and Appian Administration Console do not load successfully

Symptoms

When navigating to Appian Designer (/design) and/or the Appian Administration Console (/admin), the page does not render correctly and only displays the site background. The browser console will display the following error message:

Unable to get property 'indexOf' of undefined or null reference

Tempo and the Legacy Designer (/designer) load fine.

Cause

In custom.properties, either port :80 or port :443 is specified at the end of conf.suite.SERVER_AND_PORT.

Action

1. Stop the application server.
2. Remove :80 or :443 from conf.suite.SERVER_AND_PORT in custom.properties.
3. Start the application server.