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Method not found: 'Void Newtonsoft.Json.JsonSerializerSettings..ctor(Newtonsoft.Json.JsonSerializer"
Hi everyone, After updating to the March 2026 release (2.152.882.0), I'm unable to open any .pbip (Power BI Project) files. Opening .pbix files works without any issues. Error message: Method n...
This issue happens to me today while setting up a new laptop. If you have visual studio, it is quite straight forward to fix, hopefully will help someone:
- Assuming you have this issue because you have a lower version of this dll Newtonsoft.Json.dll in the following folder C:\Windows\Microsoft.NET\assembly\GAC_MSIL\Newtonsoft.Json
- Search your drive for Newtonsoft.Json.dll and find one with version 13.0.3.27908. You should have plenty as most applications ship with the dll that they compile with.
- Make another folder and copy that dll with higher version in that folder.
- Open Visual Studio then open Developer Command Prompt or you can go straight to Visual Studio Command Prompt.
- Change default directory to the directore you created in step 3
- run command gacutil -i Newtonsoft.Json.dll
- Confirm the new dll has been registered with GAC by seeing this message: Assembly successfully added to the cache.
- Open PBI project file again and the issue should be fixed.
Hope this helps.
Thanks - this helped me resolve the issue.
One thing I'd suggest improving in the instructions though is step 2. You can get the dll directly from NuGet: https://www.nuget.org/packages/Newtonsoft.Json/13.0.3 -> download package -> rename extension from "nupkg" to "zip" -> extract -> dll is located in "lib/net45".