"Agreement Sending Has Failed. The given key was not present in the dictionary."

Good day guys

I am hoping someone could help.

I receive this message in Dynamics CRM when i am trying to send an agreement from a custom Entity.

"Agreement Sending Has Failed. The given key was not present in the dictionary."

I have created all the necessary relationships between the Agreement and Custom entity.

I decided to send an agreement from a pre-baked relationship (Contact) and it worked.

So, i then decided to deleted the custom relationship and then recreate it.

Did another test and still does not work.

Any advise or demonstration to resolve this issue will be highly appreciated.

Kind Regards

Tyler