I am unable to reproduce this issue. Do you get this issue when exporting all reports to PowerPoint or exporting a specific report? What is the data source of the report? Is the issue consistent or intermittent?
I will appreciate that if you can share me PBIX file to test.
I receive this error when attempting to export a specific report. It's file size is less than 700 KB and queries only 1 data set with less than 5,000 records. However, it is formula heavy and contains 18 tabs. For it to process, the report needs to be significantly cut down (2 files - 1 containing 5 tabs and the other containing 3).
The data source for the report is Online Services > Salesforce Objects.
The issue is consistent.
Thank you in advance for your help. Please don't hesitate to reply with additional questions to arrive at a solution.
Based on my test, the issue is due to timeout. When I delete some report pages, the report can be exported to PPT. A similar issue has been reported internally, and the fix is on progress. I will post back once I get any updates.