Power BI file failing to open

[manoj_0911]

Hi ,

I have a Power BI file that is failing to open both in Desktop (July 2025 release) and in the Service.

Error logs show the following:

TypeError: Cannot read properties of undefined (reading 'report')
at Object.v [as parseThemeObjects]...

From what I checked, the issue seems related to the report theme JSON. 

I tried resetting the theme to default in Desktop, but the issue still persists.

👉 Has anyone faced a similar issue ?
👉 Is there a way to remove/reset?

Thanks in advance,
Manoj

[collinq]

Hi @manoj_0911 ,

Are you using Json?  This is an error that sometimes points to a json that is improperly formatted (like perhaps the theme???)  

[FBergamaschi]

I would suggest to open a ticket to Microsoft from the Power Platform admin page

https://admin.powerplatform.microsoft.com/

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