Sorry that you've been getting Windows advice for your Mac problem. Please try these steps to get rid of the error message:
- Close Word
- While holding down the Option key, click on the Go menu in the macOS menu bar and choose Library. Your hidden user Library folder opens.
- Open ~/Library/Group Containers/UBF8T346G9.Office/User Content/Startup/Word.
- Drag linkcreation.dotm to the trash.
- Restart your computer. Open Word and check that the message does not appear.