Failed to save modifications to the server. Error returned: 'The following system error occurred: Cl

[CMYORUK]

Hello ,

I am using a trial version of Power BI Desktop to run some tests on it.  I am using a trial version of Power BI Desktop to run some tests on it. In the trial version I cannot load the excel file, I get the following error message.

Failed to save modifications to the server. Error returned: 'The following system error occurred: Class not registered 

[Anonymous · Accepted solution]

Hi @CMYORUK ,

Please try to download the latest version of desktop from the official website instead of Microsoft App Store and also confirm the OS consistency.

Hope it helps!

Best regards,
Community Support Team_ Scott Chang

If this post helps then please consider Accept it as the solution to help the other members find it more quickly.