REST Data connection Error: "HTTP protocol error 406 (Not Acceptable): 406 - Client browser does not accept the MIME type of ..."

[lucienorrin]

Getting this error when attempting to load data from a REST API.

It would be nice if I could see the whole error... I tried chrome and IE but got the same error. 

I cannot save the connection because it errors out, and I can't see the whole error. Does Sense log anything at this point so I can see the complete error message?