Chrome:CompatibilityError

When you're using the userscript version of YouTube Center in Chrome natively (without Tampermonkey or the likes) YouTube Center will not have access to cross-domain requests. This means that YouTube Center will not be able to check for updates and sometimes download YouTube videos as that sometimes require fetching of the signature decoder.

The signature decoder in YouTube Center sends a request to one of YouTube's other domains to load a javascript file, which YouTube Center then decodes and finds the signature algorithm used to scramble the signature.

You can find download links to the Chrome extension of YouTube Center here. You can also choose to install YouTube Center on Tampermonkey.