Adding a new profile type for users results in a Drupal WSOD.
The error in the dblog reports a missing field "nickname". If you actually add the nickname field (from the existing basic Profile type installed by OS) to the new profile type you created, there is no more error.
Add new profile type (e.g. "Secondary profile")
Add fields to this new profile type
Go to a user's profile (new or existing user, doesn't matter)
Click on the secondary menu tab which links to this new profile type
A wild WOSD appears along with an error in the dblog.
Active
11.0
Profiles
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
I believe this is caused by #3225869: Profile: Field field_profile_first_name is unknown → basically you can't add any other profile type because it's being assumed that it will have the first, last (and optionally nick) name fields. If the patch on the #3225869: Profile: Field field_profile_first_name is unknown → works for fixing this suggest closing it as a dupe of that one?