Even with the "Fixed" version, things can go wrong. Here are the top 3 errors and solutions.
If you've followed all the steps and the X-Ray effect still isn't working, try these advanced troubleshooting tips: eaglercraft x ray texture pack fixed
However, the "Fixed" version optimizes the transparency culling, reducing chunk reload lag. On a standard school Chromebook, you should still get 30-40 FPS while X-Raying. Even with the "Fixed" version, things can go wrong
The pack was nested incorrectly. Eaglercraft needs the pack.mcmeta and assets folder to be at the ZIP’s root, not inside another folder. Even with the "Fixed" version