Server error on adding a foreign key

I am using the Schema manager to add a foreign key.

While doing, I am getting a server side error which is unhelpful.

strpos() expects parameter 1 to be string, array given

Any ideas on how to resolve this?

Can you provide some more information about this?
What version of DreamFactory?
What type of database?
What datatype is this field?
What datatype is the foreign key?
Is there anything relevant in the dreamfactory log?
What about in the browser console?

Hi, I am seeing precisely the same. Answers to your qustions for my setup:

Dreamfactory 2.4.1
Field is of type UUID
Foreign key is UUID as well
Can’t find anything relevant in the logs.
Nothing in the browser console either (except the message that you see above, which is also the only relevant thing in the HTTP reply really).