Apache LDAP Authentication

OK, I've searched all day and followed every guide I can and I'm still not getting anywhere with this.

I'm running:
RHEL 7.4
httpd 2.4.6-67
mod_ldap 2.4.6-67

and no matter what I put in the config for ldap I get the same error:
AH00526: Syntax error on line 8 of /etc/httpd/conf.modules.f/ldap.conf:
Unknown Authn provider: ldap

the offending config file is here:

SetHandler ldap-status
Require host internal.domain

Satisfy any
AuthType Basic
AuthName "LDAP/AD Authentication"
AuthBasicProvider ldap
AuthLDAPURL "ldap://hostname/dc=internal,dc=domain?uid?one"
Require valid-user

I've tried in the vhost config and in the above ldap config and get the same error.

Against better judgement I also disabled selinux (setenforce 0) but to no avail.

Any thoughts anybody?

Andy