Can you provide versions? (Moodle, BigBlueButtonBN, RecordingsBN). It is really hard to tell by guessing.
Also, can you mention the steps you followed for updating the plugin? and the version from which you updated?
>updated BigBlueButton on Moodle to the latest version and also updated BigBlueButton BN
This is the part that is confusing me. What do you mean with "updated BigBlueButton on Moodle" if BigBlueButtonBN is updated?