Good afternoon,
We have seen other instances of this and it was resolved by the following:
================== CLOSURE SUMMARY ===================
---REQUIREMENT---
While registering new user, getting an error below:
cms-accountplan-document-name-required
---RESOLUTION---
Account plans were not published. Publishing account plans under 'CMS->/sitebuilder/content/groups/AccountPlans' fixed the issue.
=======================================================
Sincerely,
Stephen Hughes
Broadcom Support