With the new Drupal core Navigation module introduced in 10.3.0, the long-standing Admin toolbar contrib module may finally have some competition.
Having a basic understanding of caching is a requirement of being a professional Drupal developer. Unfortunately, there can be many layers of caching which can make it challenging to figure out exactly how best to configure cache settings and troubleshoot potential caching issues. Web page caching can be thought of as moats around the castle, where each moat is a caching layer and the castle can be thought of as the site's web, database, and other origin servers. HTTP headers provide a mechanism for the client (usually a web browser) and a server (usually a web server) to exchange information
One of my sites had a funny error complaining about an "unsupported form of compression" shortly after installing a new module. The browser would return a white screen of death with an error message (Safari and Firefox).
Content Encoding Error
The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.
Whenever it's time for you to upgrade modules on your site, you should have a checklist of the steps involved. One step I've recently added to my checklist is to clear the site cache just prior to uploading the updated module files.