Error importing from animelon

I get this error message:
Error: Importing failed - Unable to download JSON metadata: HTTP Error 520:

Browser: Firefox

Are you unable to import anything from there? Or is the issue with specific video only?

I’ve tried a different one and I still get the same error.
Btw, the first time I try the extension complains about an invalid image. Subsequent attempts produce the above error message

Thanks, we will look into it and have it fixed.
Not sure if you are familiar with this other similar resource, but just in case: