Hi All,

I've just come to login to my development site this morning using the standard facebook authentication plugin on Dnn 7.4.2, got a critical error and looking a the event log I see :

"The added or subtracted value results in an un-representable DateTime. Parameter name: value"

Diving into the code It happens on this line:

"authTokenCookie.Expires = DateTime.Now.Add(AuthTokenExpiry);"

And AuthTokenExpiry has a value of: "{-10675199.02:48:05.4775808}"

I will continue to debug, but any help greatly appreciated.

Thanks