Your account has been marked as a spammer

After login, if you click on “My Enclave” button, you will be redirect to another subsite, but when I try do this, I got:

ERROR: Your account has been marked as a spammer

I am using a Join My Multisite plugin which allows for login across the sites, also, the subsite uses BuddyPress that should be the culprit of this issue. What can I do to avoid this?