salesforce_instance_url missing from salesforce settings screen
I am trying to test some of my salesforce service calls, i am getting an error.
{
"status":"400 null",
"url":"",
"response":"URL has incorrect format"
}
it looks like the salesforce_instance_url is empty, according to the tutorials this is supposed pre filled when Oauth is authenticated. but it was not filled where do i get the value from?