To determine which version of Office 2016 - in Excel, please go into menu File / Account and look at "About Excel"

If the version is "Version 1804 (Build 9226.2114 Click-to-Run)" the below workaround is applicable.


(for more information on the delivery of Office Builds by Microsoft through different channels - see

https://support.office.com/en-us/article/Version-and-build-numbers-of-update-channel-releases-ae942449-1fca-4484-898b-a933ea23def7?ui=en-US&rs=en-US&ad=US#bkmk_bydate

https://support.office.com/en-us/article/update-history-for-office-insider-for-windows-desktop-64bbb317-972a-4933-8b82-cc866f0b067c 


for more information about the Microsoft Office 2016 Updates Roll Back procedure described below - see

https://support.microsoft.com/en-us/help/2770432/how-to-revert-to-an-earlier-version-of-office-2013-or-office-2016-clic

https://social.technet.microsoft.com/Forums/office/en-US/684e7f2d-560b-480a-8c8d-cc6f6fcbca28/office-2016-updates-roll-back?forum=Office2016ITPro )




This is solved by upgrading Planner to the build 4232 or later.


https://www.docu-pc.com/pc2/doku.php?id=canvasplanning:releasenotes