Boy I wish I new more about Microsoft Project so that I could help you further, but I don't.
The image you attached, suggests that "Project" can't open the "file" and the files in the window look to have been produced in either Microsoft Excel and or Microsoft Word, based on the icons that I am seeing.
Do you also have Microsoft Word and Microsoft Excel installed on your computer? IF so then perhaps opening the "file" with the appropriate program might help.
Otherwise you might need to resort to one of the free "Office like" productivity suite alternatives that Wolfie suggested above. My personal preference is "LibreOffice"