Missing assembly binding redirect from StackExchange.Redis 2.0.513 package
Add assembly redirect:
<dependentAssembly> <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" /> <bindingRedirect oldVersion="4.0.2.0-4.0.3.0" newVersion="4.0.3.0" /></dependentAssembly>Found the details here.