I got this error and.. nothing on the web ! It seems to come from Newtonsoft.Json..
There is the output
of my PCL project
1
Ensure you have updated all the packages to the latest versions, you have Visual Studio 2015 Update 3 and the latest stable version of Xamarin.
Some developers have mentions, that building release app packages can cause issues if you don't use the English version of Visual Studio - if you don't, set it in Tools -> Options -> International Settings
.