Teams fails to launch - chrome browser console error Navigation to external protocol blocked by sand

EventHorizon 

Since the community has not yet responded to your post, you might want to seek assistance with other resources that are focused on tech support:

• Ask your IT manager to open a support case or call Microsoft using the support line you were given.  Other options for business subscription admins are listed here:

https://docs.microsoft.com/en-us/microsoft-365/business-video/get-help-support?view=o365-worldwide#:~:text=Online%20support%201%20Go%20to%20the%20admin%20center,contact%20method%2C%20and%20then%20select%20Contact%20me.%20

https://support.serviceshub.microsoft.com/supportforbusiness/create

• Additional tech support is available at https://support.microsoft.com/ or https://answers.microsoft.com/, where authorized Microsoft agents are available to trouble an issue until it’s resolved.