Could not connect to the LDAP server. Please check your LDAP configuration
Setting Transport to TCP - Standard in System: Access: Servers solved the issue.
Do not forget to revert back to TLS/SSL after import
QuoteDo not forget to revert back to TLS/SSL after import Do you think this could be a bug?
Maybe. You can open an issue on github.
I haven't this problem. Do you have imported the certificates of your LDAP server?