Exact same problem here...
Using Kubuntu 17.10 and Crossover 17.0.0
Despite the fact that Crossover Software Installer marks MS Office 2016 with 4 stars and the label: "Runs Well", while installing the fonts installation goes without problem, and also the MSXML 6 Service Pack 2, but then the MSOffice installation stops at about 75% of the installation process with only the message: "Microsoft Office Professional Plus 2016 encountered an error during setup" and no other options but a "Close" button...
When pushing the "Close" button Crossover never realizes the setup process has been aborted and remains with the "Installing Microsoft Office 2016" moving gauge active until you click the "Cancel" button. At that point it displays "The installation failed" and allows a review of the "debug.log" file...
The debug file is very big to post it here (16027 lines), but the error lines start at line 1430 with the first errors being:
Line number Message
===
1433 fixme:ntdll:EtwEventRegister ({5eec90ab-c022-44b2-a5dd-fd716a222a15}, 0x401123, 0x40f020, 0x40f038) stub.
1434 fixme:ntdll:EtwEventSetInformation (deadbeef, 2, 0x40d8c8, 43) stub
1441 fixme:ntdll:EtwEventRegister ({5eec90ab-c022-44b2-a5dd-fd716a222a15}, 0x10001123, 0x10062060, 0x10062078) stub.
1442 fixme:ntdll:EtwEventSetInformation (deadbeef, 2, 0x1005a888, 43) stub
1446 fixme:ntdll:EtwEventRegister ({8736922d-e8b2-47eb-8564-23e77e728cf3}, 0x1001beec, 0x10062800, 0x10065e48) stub.
1447 fixme:ntdll:EtwEventRegister ({f50d9315-e17e-43c1-8370-3edf6cc057be}, 0x1002cb4f, 0x100627c8, 0x10065e08) stub.
1448 fixme:process:GetSystemDEPPolicy stub
and the list goes on for the next 15,000 or so text lines...
Can sombody please help with this issue????