We cache the Modeller config in memory for performance reasons - this saves a call and response to the database every time we need a particular setting (which can happen hundreds of times while rendering a single page). The cache can take a few seconds to reload from the database, and must be loaded entirely, so we don't want to do this every time you make a change in Modeller. 

Hitting the refresh config button (often called “busting the cache”) is a simple manual step that basically means, "I'm finished making changes to Modeller." It then refreshes all data from the database into the memory cache, ensuring that any changes are immediately visible on the ShareDo frontend. This way, everything stays up-to-date for a smoother experience.

Occasionally, you might get an “Invalid token response” error when trying to “bust the cache”. This could be because your browser is trying to use an invalid access token. Clearing your browser cache should fix the issue.