This problem typically arises when a user tries to open a Word document that was initially made in a previous iteration of the Word program in the most recent version. It might also occur as a result of Word document corruption, though.
Verify the "Trust Center" configurations..
Turn off protected view; it can fix and open corrupt Word DOC and DOCX files as well.
Users may occasionally be prohibited from opening Word files due to Windows security settings.
Make use of the "Open and Repair" function.
Convert Word document to new format: THIS PROCEDURE WILL CHANGE THE WORD FILE TO A NEW FORMAT. Replace the document with a new one; -Make expert repairs to Word files;
Let’s investigate how to open a Word document that is refusing to open.
Occasionally a file may get corrupted to the point where Word, Excel, or PowerPoint are unable to open it properly. All is not lost, though. Your file may be recoverable with the OPEN AND REPAIR command.
Navigate to the location or folder containing the Word, Excel, or PowerPoint document, workbook, or presentation by selecting FILE > OPEN > BROWSE. The file will not open in the Open dialog box if you attempt to open it from the RECENT section.
Choose the location, such as OneDrive or the local computer, if you’re using Office 2013, then click BROWSE.
Using Office 2010 eliminates the need to click BROWSE.
After selecting the desired file, click the arrow next to OPEN, then select OPEN AND REPAIR.
Let’s examine the reason why my phone is unable to open DOCX files.
Document Format Compatibility: It’s possible that the Android app you’re using doesn’t support more recent Word document formats (like DOCX) or only partially supports more complex formatting in older formats (like DOC).
Device Storage Restrictions: Your device might not have enough space to open and edit large Word documents if its storage is full or almost full.
App conflicts: When opening documents on your Android device, several office suite apps you may have installed may clash with one another.
Document Corruption: A corrupted Word document might not open on any platform or device. A number of factors, including incomplete downloads or software bugs, can lead to corruptions.
Software Updates: When attempting to open documents, outdated or incompatible software—such as the Word app or the Android operating system—can cause issues.
Absence of Internet Connection: In order to access documents stored in cloud services like OneDrive or Google Drive, certain office suite applications require an internet connection. It might not be possible for you to open documents saved in the cloud without an internet connection.