Allows GPS in the web browser
In the URL bar of the web browser, click the location icon > checked the "Continue allowing this site to access your location" option as the image below 
Microsoft Team Client
Click the icon as the image below & enable the location 
Microsoft Team Mobile
Click the avatar icon on MS Team mobile & click the Setting button 
In the setting page, click the App Permission button 
Select the Staff Check In-Out app & turn on the location Permission 
Still stuck?Email us at support@ltaddins.com or call +84 946 579 539.
