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TRoman's avatar
TRoman
New Member
5 months ago

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...
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MichaelGilmore's avatar
MichaelGilmore
Icon for Microsoft Employee rankMicrosoft Employee
5 months ago

Can you please check to see if you have an old version of Netwonsoft.Json installed at this path?

 

C:\Windows\Microsoft.NET\assembly\GAC_MSIL\Newtonsoft.Json

 

Power BI Desktop might be running the old version from here rather than the new version bundled with the March update.

RomanTesolkin's avatar
RomanTesolkin
Frequent Visitor
5 months ago

Hi MichaelGilmore, will try to fix internally and hope with next release the issue will be fixed permanently.  The answer we got from MS support: 

If you would, can you go to the file locations from Process Explorer (the screenshot that's down thread), right-click on the dll and choose Properties and find what the actual file version is? While you're in there, head to the folder at C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Newtonsoft.Json\, select the .dll there and check its versioning as well. 

 

If it's not 13.0.3.2798, that's the source of the error you've been seeing. Your IT team will need to update the version of the Newtonsoft.Json.dll in the GAC to 13.0.3.2798 or newer on affected machines

This is what our version is and has errors in March release: