Error authenticating through LDAP

Integrating Grafana to our AD, authenticating presents message
“Error while trying to authenticate user”. The log shows the following information “t = 2020-10-14T09: 03: 12-0300 lvl = eror msg =” Error when trying to authenticate the user “logger = context userId = 0 orgId = 0 uname = error =” The user already there is “remote_addr =”.
I have two servers with Grafana installed, one is Debian and the other CentOS.
I replicated the LDAP settings on both servers. In Debian it works normally, but in CentOS it presents the error.

Grateful for the attention.