Hey vegastoycon,
There has been changes in Envato’s API and the old version of the theme doesn’t contain the updated code for updating the theme in this new API.
Can you try to do this process? make sure to have a backup first.
1. Switch to a default wordpress theme like twentynineteen
2. Delete the Enfold theme
3. Upload the latest version of Enfold (enfold.zip) then set it as the active theme again.
Best regards,
Nikko