Information regarding Squid LDAP auth

Dear All,

I needed one small information. Is squid_ldap_auth and basic_ldap_auth serve same purpose?

I had squid_ldap_auth in 11.4 and now I can see basic_ldap_auth in 12.3

Also while configuring new ACL with External Auth, I am getting error Message
Can’t use proxy auth because no authentication schemes are fully configured.
FATAL: ERROR: Invalid ACL: acl auth proxy_auth REQUIRED

Can Somebody Please help me??