The version of Office 365 Pro Plus you have installed is the developer version. It’s actually on par with Office 2019 which is currently in development, but won’t be releasing for a few months.
If possible, the best scenario would be for your IT department to make a change in the version of Office 365 they download.
- Have them login to the Office 365 and on the left hand side, hover the cursor on the Gear Icon and then select Services and Addins
- Next, scroll down until you see Office Software Download Settings
- Change the button from Every Month (Monthly Channel) to Every 6 months (Semi Annual Channel)
- Uninstall Office and when Office is reinstalled, it will download the 1808 Office 365 version and everything will begin working correctly.