How to add new administrator to your Facebook app?
You need to add another administrator to your Facebook app to enable collaboration for development or debugging. Here's how:
Go to your Facebook app.
On the sidebar, click Roles > Roles.
On the upper right, click Add Administrators button.
Put the username of the person you want to add as administrator. In our example it is: ameliapondsk
Click the Submit button and wait for a reload.
The person will accept your invitation. Done!
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Go to your Facebook app.
On the sidebar, click Roles > Roles.
On the upper right, click Add Administrators button.
Put the username of the person you want to add as administrator. In our example it is: ameliapondsk
Click the Submit button and wait for a reload.
The person will accept your invitation. Done!

Updated on: 10/11/2021
Thank you!