UPM shows Page Not Found when accessed from Navigation menu
Problem
When accessing Administration >> Add-ons
and then clicking the Manage Add-ons or Find Add-ons links, the Universal Plugin Manager (UPM) returns a "Page not found" (404) error instead of loading the page.
Cause
This is caused by the Application's base URL configured in Administration >> Overview >> General configuration
being set incorrectly, with the URL commonly appearing as <original base url>/setup/setupGeneralConfiguration.action;jses
.
Resolution
Please update your Base URL, in Administration >> Overview >> General configuration
to match the URL that you use to access Bamboo. If you have Bamboo behind a reverse proxy, please be sure to use the proxy URL.