VS2015 / SSRS - Ora-1008 Not all variables bound

We are converting reports from VS2008 to VS2015. Same report runs fine in VS2008 but when we move it to VS2015 we are getting an error ORA-01008 Not all variables bound. Banging my head trying to figure out what the issue is. I created a simple 1 parameter report to see if I could figure it out, but am still stuck. Any help would be appreciated.

and here is the error I get when I execute

if you google this you will see that it is related to an Oracle plugin version issue? Are you connecting to an oracle instance?