Exception - Firebase\JWT\JWK::parseKeySet(): Argument #1 ($jwks) must be of type array, null given, called in [dirroot]/mod/lti/locallib.php on line 1368

[mgarefal]

Hello,
does anyone know what causes this exception:
Exception - Firebase\JWT\JWK::parseKeySet(): Argument #1 ($jwks) must be of type array, null given, called in [dirroot]/mod/lti/locallib.php on line 1368
it is raised when putting grades in moodle.

Thanks in advance

[PenghaiZhang]

Hi @mgarefal , have you sorted out this issue? I am getting this error as well.

[joerou]

I am getting this as well when I put in the keyset url, but not when I paste the key in directly in pem format. So, not sure what's causing it, but that might be a workaround for now.

[hmoffatt]

I am getting this as well when I put in the keyset url, but not when I paste the key in directly in pem format. So, not sure what's causing it, but that might be a workaround for now.

Are you sure your JWKs URL is returning the right format? There's a bug in the examples, see #53