Entity error on add new user
NOTE:Make sure to take backup of database before doing below changes to avoid any issues.

Search for "field_housing_coop_ref" field in entire database including cache tables, mostly cache_* and key_value tables. Once you've all matching records with you, delete one by one very carefully by reading there names properly to make sure nothing else get deleted.

Once you've deleted matching records for "field_housing_coop_ref" field, rebuild cache by navigating to "Admin => Configuration => Development => Performance" or using Drush command "drush cr".

Updates:

If there are any other references for this field inside other fields in key_value table, make sure to delete those field from Field UI and then cross verify again.