I get the same error(kernelbase.dll, Fault offset 0x0010d722) when trying to merge mail using Word 2013. Problem already occured before the upgrade to 1803.
I can hardly find anything about it on Google.
I've tried both repairing and completely reïnstalling Office, without luck.
Creating another Outlook profile or using another userprofile also did not do anything.
Using safe mode also did not work.
Compatibility mode was unsuccesfull.
I also got an error when trying to re-register kernelbase.dll.