Meta -- The page admin who installs the app has ceased being an admin

I have this problem with my Meta/Facebook Webhook, It does not allow sending data to my CRM, when I test it the webhook returned me this error "The page admin who installs the app has ceased being an admin".

I don't understand if I have to delete and create a new app (something that I don't want to do) or maybe change this app admin somewhere.

PD: I have role admin, but I didn't create the app, the one how did it is no longer working with us.

PD2: The function that retrieve the data is located in Google Cloud Functions (I don't think this matters for the webhook error)