FIX: There was a Problem Sending the Command to the Program
When you attempt to open a file, an error message appears on your screen, preventing you from accessing the file. If you encounter this problem, this tutorial will teach you how to work around it.
Check your compatibility tab
Open your File ExplorerΒ and navigate to:
C:\Program Files\Microsoft Office 15\root\office16
Locate WINWORD.exe and right-click on it.
Choose Properties.

Click on the Compatibility TabΒ and unselect all the checkboxes.

Click on Apply and OK to save your changes.
Change other Word settings
Open any Word file and go toΒ File tab,
Click on OptionsΒ at the bottom left.
Select Trust CenterΒ and go toΒ Trust Center Settings.
On the Macro Settings tab, selectΒ Trust access to the VBA project object model.

ClickΒ OKΒ to save your changes.
Repair Microsoft Office
OpenΒ Control Panel and go to Programs.
Click onΒ Programs and Features.
Look forΒ Microsoft Office and right-click on it.
SelectΒ Change.
Choose Quick RepairΒ orΒ Online RepairΒ and click on Repair.

Follow on-screen instructions when prompted.
Disable Add-ins
Open any Word file and go toΒ File tab.
Click onΒ OptionsΒ and selectΒ Add-ins.
Select COM Add-insΒ from theΒ Manage.
Click onΒ Go.
Unselect the checkboxes available.

Click on OKΒ and restart your Word app.
NOTE:Β If you have more than 1 add-in, unselect them one at a time and restart your Word app every time. This way, you will be able to see which add-in is causing the error.