User and Team roles cannot add transactions to their journal entries. The type of role for the account can be seen on the top right of the account above the account number.  A Constituent role will need to be created or used instead to add transactions to their journal.

To add a Constitutent Role to the current account
  1. Click Account Settings
  2. Click Add Roles
  3. Mark Constitutient
  4. Click Save And
Once you have added the Constituent role, you can use the steps listed at I need to add a gift to a constituent account to add Gifts to this account.