You can simply decline the invitation.
Manage your received invitaions on the invitations-page. Open the usermenu, click Invitations.
Or go to https://app.mindburp.se/user/friends/invitations
Manage your received invitaions on the invitations-page. Open the usermenu, click Invitations.
Or go to https://app.mindburp.se/user/friends/invitations