Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Open in Safe Mode and troubleshoot accordingly: https://support.office.com/en-US/article/Why-do-I-get-a-stopped-working-message-when-I-start-my-Office-application-52bd7985-4e99-4a35-84c8-2d9b8301a2fa
If this would not work remove the current installation -> restart -> install it again.
Uninstall Office 2016: https://support.office.com/en-us/article/Uninstall-Office-2016-Office-2013-or-Office-365-from-a-PC-9dd49b83-264a-477a-8fcc-2fdf5dbf61d8
Install Office 2016: https://support.office.com/en-us/article/Install-Office-on-your-PC-or-Mac-4414eaaf-0478-48be-9c42-23adc4716658