There are several ways available to validate an AMP document.
It’s also used by platforms like Twitter or Google who integrate your AMP pages into their content and search results.
More so, they usually don’t request the pages directly from your server but make use of the Google AMP Cache, a free service that caches your pages and makes them available across the world, so they load even faster.
You can tell to use any A compatible promise implemention like this: There are already many validation libraries out there today but most of them are very tightly coupled to a language or framework.
The goal of is to provide a cross framework and cross language way of validating data.
Is there a fix or at least a reliable way around it? The way I fix it is to defragment my local game cache. Also, I can't defrag either, and fragmentation is shown as "unknown." When it reaches 100% and "freezes" it isn't actually frozen.
Access this by going to library, right click on Team Fortress 2, click properties, click local files, then click on defragment cache files. The validation at 100% was showing, but I did notice there were further downloads to do - and were in progress for TF2. Turns out that the 100% validation was "done" on a partially-completed download from over a month ago.
The AMP Validator isn’t just a convenience for you during development.
If the AMP validation service detects that there’s something wrong with your page, it won’t get discovered and distributed by third party websites and won’t appear in the Google AMP Cache.
So not only would you lose the speed benefits of the cache, it’s likely that your page will not be seen in many places!