getting configuration error (no replies)

I have recently installed wampserver64.It worked fine at first but now apache service is not running when i had tried to check the apache.error log I am getting the following error: [authnz_ldap:error] [pid 3820:tid 436] AH01749: Module mod_ldap missing. Mod_ldap (aka. util_ldap) must be loaded in order for mod_authnz_ldap to function properly
AH00016: Configuration Failed

I am a beginner therefore I need advice on how should i proceed with fixing this issue.