Fix: Clear your browser cache. The verified client is heavy (approx. 35MB of decompressed JS heap). Use a modern browser with at least 2GB of RAM allocated.
Here is where the internet gets confusing. In the Eaglercraft community, "verified" does not mean an official release from Mojang Studios (let's be clear: Microsoft does not endorse this). eaglercraft 112 client verified
Instead, in this context, "Verified" means: Fix: Clear your browser cache
Fix: You must enable cross-origin isolation. Launch your browser with these flags: in this context