The Phabricator instance was configured with LDAP. The configuration worked so far and 31 users are registered and approved in Phabricator.
However, two of them (these two were not the latest who registered, but the 19th and 22nd account) cannot login with their LDAP account.
They receive the following error message:
The external account ("LDAP") you just authenticated with is not configured to allow registration on this Phabricator install. An administrator may have recently disabled it.
I checked and all accounts are approved.
./bin/auth ldap
returns
Found LDAP Account: <USER>
What could be the problem and how could I get information why their login failed?