Which version of power bi desktop you are using? Please make sure all your versions which you are using to open files are the same. If the version is before Sept. 2020, pelase try to disable 'Store datasets using enhanced metadata' format in Options and restart power bi desktop.
If the version is after Sept. 2020, the enhanced metadata format is bulit-in by default, try to run power bi desktop as administrator to check it again.
Best Regards, Community Support Team _ Yingjie Li If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.