The Error Code 107 is most probably related to a internet connectivity issue, as you may see a message just below the error code - "Failed to load https://teams.microsoft.com"
The most common reason for 107 errors is that the Teams app is unable to connect to the Microsoft Teams server.

Below are a few steps that you can try to see if helps:
- Make sure you have a stable internet connection. Try to switch to some other network and check.
- Restart the Teams application and check if the issue still persists.
- Make sure there is no outage at Teams server end (if you are an admin check Teams Health Status at https://admin.teams.microsoft.com)
- Make sure your Teams application is up-to-date.
- Clear the cache of your Teams application under %appdata%\Microsoft\Teams.
- Try to see if Teams Online works: https://teams.microsoft.com/go#
- Make sure that there are no proxy settings that are blocking access to the Teams application.
- Check your firewall settings that may be causing issues with connecting to the Teams server.
If nothing works, its better to reach out to your IT Admin, or try: https://support.microsoft.com/en-us/teams.
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