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Hi Jezza38 ,

Here are some suggestions that may help you solve your problem.

1. Make sure you are running the latest version of Power BI Desktop. Download link: Download Power BI Desktop from Official Microsoft Download Center.

2. The error message "Cannot read property of undefined (read 'findTable')" indicates that there may be a problem with the way the report is trying to access or render the table. Check elements of the report, especially those involving custom DAX queries or advanced visualizations, to make sure they are configured correctly and are not causing errors.

3. Here is a link to a problem similar to the problem you encountered, I hope it will be helpful to you. Solved: an error occurred while rendering the report - Microsoft Fabric Community.

4. If the problem still cannot be solved for you, please provide more detailed information.
1) What error occurred while doing it? Has the same error been reported before?
2) What is the connected data source? Which connection method to use?
3) Has anyone else encountered the same problem?

Best Regards,

Clara Gong

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