The Error I am getting is:
Cannot convert value of type '(NSError!) -> Void' to expected argument type '((Error?) -> Void)!
The code that is causing this error is
RevMobAds.startSessionWithAppID("<YOUR_APP_ID>",
withSuccessHandler: completionBlock,
andFailHandler: failureBlock)
Has anybody had this error when using RevMob before or have any ideas on how to fix? Thanks

You are probably using the new Xcode and Swift 3.0. There have been a few changes on how Objective-C is converted to swift.
You only have to change the
errorBlockcode from what we have in our documentation to this:and add the parameter name to the
startSessioncall: