Hello,
Could you check if you allowed access to your media while generating token https://prnt.sc/UDFvB37PZ2dt ?
Also, you need to add our user as the developer to your FB dev account https://prnt.sc/_t6hKXUzVICz because we need to check the settings that you used there and that you gave all the necessary permissions. Because we checked our test sites and did not face the mentioned error with the personal accounts, so, it means that you made something wrong while generating the token or while setting the app settings.
Regards