The .docx file you are trying to open seems to be corrupted therefore, you are getting the above errors. Whenever a Word document gets corrupted, we must try to open it by Open and Repair. This is a built-in repair function of MS Word that repairs a corrupt
word document and opens it.
Open your MS Word program > click on
Office button > click on Open > locate the corrupt .docx file
> click on the arrow shown next to the Open button.
Within a few seconds the selected .docx file will be repaired and opened. If this fails to open the .docx file and you are still facing those error messages, then I'll suggest you to check some Docx recovery applications. You can check SysInfoTools Docx
Recovery software. I've read about it in an article. It's available with demo version which can be freely downloaded from sysinfotools' website.
I hope this helps you repair your corrupt .docx file.