Good day guys!

I just install the follow feature plugin from https://github.com/r-a-y/buddypress-followers

to my website and activated it. When I tested it and tried to follow a user, it causes an error that can be seen in this link:
https://hostalyf.com/web-portal/wp-content/uploads/2020/08/follow-error.png.

I tried troubleshooting it if it has complications with other plugins so what I did, I deactivated all of my plugins except buddypress and that buddypress follow plugin. It still gave me that error.

I just want to ask if someone already encountered this error and how did you fixed it.. .Any help is much appreciated. Thanks!