Office 365 (Teams) - Error - We are not able to access your events

When you click on the 'Meetings' tab within Teams client, you receive error: "We are not able to access your events. Please contact your system administrator."

Reason for error

'Meetings' uses Exchange Wide Services protocol (EWS) to interact with your Office 365 calendar data.

Fix this error

Enable EWS applications protocol using steps outlined in Office 365 - Which clients/protocols will be supported?.