Close Compass, replace the existing permission file in %appdata%\Tobii Dynavox\Compass with the one below, and restart Compass. If it is an issue with permissions it should speak now.

https://linkat-my.sharepoint.com/:u:/g/personal/support_linkat_onmicrosoft_com/ERE6wVQiIfFDo2L3szUcDT0Bg0VNSCHrSRO0W-kivxa7RQ?e=o2GQGX