I removed SchoolTool and all dependencies. Reinstalled SchoolTool without LDAP and the same problem continues.
LDAP authentication worked like charm before I logged into Zentyal UserCorner. After that even removing UserCorner and SchoolTool doesn't help. I try to purge all once again (Zentyal and SchoolTool) and try to install everything again (without UserCorner).
I removed SchoolTool and all dependencies. Reinstalled SchoolTool without LDAP and the same problem continues.
LDAP authentication worked like charm before I logged into Zentyal UserCorner. After that even removing UserCorner and SchoolTool doesn't help. I try to purge all once again (Zentyal and SchoolTool) and try to install everything again (without UserCorner).