When i click on LDAP Server under General  Settings > LDAP Authentication it shows an error:

The operation cannot be completed, probably due to the following:- deletion: you may be trying to delete a record while other records still reference it- creation/update: a mandatory field is not correctly set
[object with reference: website_id - website.id]

Screenshot - https://snag.gy/81TpQi.jpg

How to solve this? and how to conif LDAP?

Thanks