Your Adobe ID and Frame.io ID must be linked to create integrations with Frame.io V4
If you're creating a Frame.io (V4) integration with MASV, the process and requirements are different from previous Frame.io (Legacy) integrations. Adobe and the Frame.io team have rebuilt the API for V4 and now require you to use your Adobe ID to authenticate. This means you no longer need to create a Dev Token for integrations, but your Frame.io ID must be linked to your Adobe ID. If there is no link, the "bad credentials" message will display in MASV when you try to authenticate the connection.
To solve the issue, in Frame.io (V4), follow the instructions linked below.
Instructions: Connecting to Adobe authentication
Note: The email account you use for your Frame.io account and your Adobe ID account must be the same.
In Frame.io V4, you can link your Frame.io ID and your Adobe ID and enable your Adobe ID for Frame.io authentication.