I can open excel files in ArcGIS Pro before. But now it is not working. Even the 'Excel to Table' and 'Table to Excel' tools are not working. I am trying to open a project with excel files in it but the project is not loading.
I can work with Excel files before and I have the Access database engine installed so I am not sure what the problem is
Did you upgrade Pro?
Install the drivers to work with Microsoft Excel files—ArcGIS Pro | Documentation
Work with Microsoft Excel files in ArcGIS Pro—ArcGIS Pro | Documentation
There are lots of related threads in Community about Excel issues, so you may want to use it as a keyword search to see if you have a related issue
For example
Re: AcrGIS Pro 3.0.2 will not open Excel files - Esri Community