I just spent an insane amount of time figuring out why my items were not being sent from our C# app (async .Error()/Info() etc silently failed - switched to AsBlockingLogger() and finally saw the failure (nested exception where the deepest one was an asseembly load failure on Newtonsoft.Json dll).

Our application depends on Newtonsoft.Json version 13 and there are known compatibility issues with using bindingRedirects etc to address this since .NET assembly versioning was not handled correctly by Newtonsoft.Json - and Assembly.LoadFrom() is also a non starter:

https://stackoverflow.com/questions/31608983/newtonsoft-json-net-version-incompatibility-dll-hell

I am at the point where I have locally upgraded the Newtonsoft.Json package and built from Rollbar source and am now able to keep moving. Do you want a pull request for this?