Object not set to an instance of an object

Hi, So i was facing the same issue, and i have checked all my connections and everything but no use. But now it is solved. so guys this might be the issue of not replacing the old file but what you can do is, rename you exisiting file and save it with a new version and when you publish the report with a newer version which will not replace the previous one on powerbi.com, it will get publish without any issue. Please let me know if you still face the issue. Prashant Utneja