Recently I suffered an issue in testing our new app, the BlueBridge Glossary for MS Teams, in the Internet Explorer 11. Out of a sudden, Teams refused to start and hung up in a loop of crashing and trying to sign me in. Go on reading this article to find the solution which worked for me to solve this issue.
To make MS Teams work again with the Internet Explorer, it is necessary to add some sites to the trusted sites in the internet options. Microsoft suggests to add the following sites:
After adding the URLs above and restarting the browser, I was finally able to login to MS Teams in the Internet Explorer again.