My Assets plugin is not working on EE 2.4. It continually loads. Also when I try to add an asset when adding an entry, nothing comes up when I click "Add File". I have Super Admin access and when I click "Settings" I just get a blank field for "License Key"
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at . (Reason: CORS header 'Access-Control-Allow-Origin' missing).
In the case of EE and Assets, that usually means you're accessing the EE control panel from a different domain that's specified in your
Admin->General Configuration->URL to your "themes" folder and
URL to the root directory of your site settings.
And keep in mind that
domain.com are technically considered two different domains. That often trips people up.
This type of behavior is usually caused by a missing script asset. Open your browsers developer tools (F12 or Command+Alt+i) and look at the developer console or network tab to see if some files aren't loading. Also, you might see other errors in your console; perhaps you've recently added an accessory that is dumping extra scripts on the page that they are namespace collisions with something related to Assets.
Often, just re-uploading the third-party themes folder for an add-on resolves these issues.