Nextcloud Office Bug. Document fails to load on share

Every office doc I share cannot be loaded. Same error appears in the nextcloud log. The bug appears due to anonymous share recipient not having a valid UserId, I love the office integration, but am disappointed that upon my first share test it breaks and share recipients are unable to load and edit documents. This severely cripples the user experience and makes the entire office integration of much less value. I hope the bug receives high priority attention.

TypeError: Argument #1 ($uid) must be of type string, null given

[index] Error: OC\Group\Manager::getUserIdGroupIds(): Argument #1 ($uid) must be of type string, null given, called in /var/www/nextcloud/lib/private/Group/Manager.php on line 316 in file ‘/var/www/nextcloud/lib/private/Group/Manager.php’ line 333

GET /index.php/apps/richdocuments/wopi/files/?access_token=&access_token_ttl=0&permission=edit
from 192.xxx.xx.xx at 2022-03-08T10:31:48-08:00