You can try uninstalling the offending updates. If you can't do that, you can take the brute force approach and do a "retrograde upgrade" back to Office 2013 so you can run it until you hear that the problem has been fixed.
Mac Downgrade- Download and Load Specific (old) versions of Office 365/2016 for MAC
If you're using Office 365 and saved the original installer, or if you purchased Office and have the download or DVD plus your 25 character Product Key, you can uninstall Office using these instructions: Uninstall
Office 2016 for Mac. Then re-install.
Do not immediately use Help>Check for Updates. Instead, Google office 2016 for mac download 15.27 updater. You're looking for a link that starts with MS16-121: Description of the security update for Office 2016 for Mac. This is the manual updater. Download and run it to update to 15.27, then ignore Office's suggestions to update after that.
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If you go tothe page of updatesand scroll DOWN I think the version 15.27 is still there.
How do I use the Office 365/2016 offline installer? Downgrade to Office 2013 - Down Grade - Back out
https://support.office.com/en-us/article/How-do-I-use-the-Office-2016-offline-installer-f0a85fe7-118f-41cb-a791-d59cef96ad1c
Offline installer
Looking for help with a one-time purchase of Office 2013 or Office 2016?:
Download
the install files for a one-time purchase of Office 2013 or Office 2016
http://answers.microsoft.com/en-us/office/wiki/office\_365hp-office\_install/retrograde-upgrade-office-3652016-to-2013-download/fbdf55d9-9b62-4ac0-95af-56a9f848c2b2
- installer options, including downgrade
https://support.office.com/en-US/article/How-do-I-reinstall-Office-2013-after-an-Office-2016-upgrade-a6ca92f4-cbb4-4609-9fdb-f8d3dd6812f3
How do I reinstall Office 2013 after an Office 2016 upgrade?
http://www.slipstick.com/outlook/office-365-office-2016downgrade-rights/
Downgrade Office 365/2016 to Office 2013
http://new.office-watch.com/2015/switch-from-office-2013-to-office-2016-the-real-story/
Switch from Office 2013 to Office 2016 – the real story (Office Watch)
If you need to install Office 2016 without an active Internet connection, or if you're having problems with slow speed or tenuous connections, you can download the offline installer file and then
install Office 2016 at your convenience. Go to the Wiki link above for instructions with pictures
Start on the On the
My Account
page, choose Install.
Choose Language and install options.
Choose Additional install options.
Choose Download offline installer.
After you see a prompt to open or save the offline installer file, choose your preferred option.
If you choose Open, the file will download. Once the download is complete, you'll see a new virtual drive D that contains the Office installation files.
Note If you already have another drive labeled D, Office will create a virtual drive with the next available letter.
If you choose Save, you can specify where you'd like the image (.IMG) file to be saved. For example, you can save it to your desktop or to a USB drive. On Windows 10 and Windows 8 machines, you can open the file directly. If you use Windows 7, you'll need to copy
the image file to a disc before you can open the file and continue to step 6.
Launch setup.exe to begin the offline installation. When you see the message,
You're all set, you can now access your Office applications.
The first time you run one of your Office applications, you'll receive a prompt asking you to enter your product key to activate the product. Since you already have a Microsoft account that's
associated with Office, choose Sign in with an active account instead.
Enter your email address, and then choose
Next.
Note Make sure the email address and Microsoft account you use is the same one you used previously.
Enter the email address and password associated with your Microsoft account, and then choose
Sign in to start using Office.
For more information about installing Office, see
Download
and install Office 365 Home, Personal, or University on your PC.
Looking for help with a one-time purchase of Office 2013 or Office 2016? Associated with email Account - Offline Installer
Download
the install files for a one-time purchase of Office 2013 or Office 2016
https://support.office.com/en-us/article/Download-the-install-files-for-a-one-time-purchase-of-Office-2013-or-Office-2016-0fdd3f0e-9b3f-4689-9f43-03e1143bb20e
Looking for Office 365 help?:
How
do I use the Office 2016 offline installer for Office 365?
If you made a one-time purchase of Office 2013 or Office 2016 (not a subscription to Office 365), you can download the install files directly to your computer.
Important Downloading the install files can take quite a while. Please be sure your computer stays powered on and connected to the Internet while downloading.
Sign in to your
My Account page.
Choose Install from a disc.
Choose I want to burn a disc, and then choose Download.
Save the installation file to your computer and then run it to install Office.
**Applies To:**Office 2013, Office 2016