Analytics - TIM installation error

Hi folks, there is a lot of Analytics talk on this forum, so I thought I'd throw this out in case anyone has seen it.  We're on v15.0.3 and installing Analytics for the first time. The server is a newly set up Windows 2016 & SQL Server 2016 Std.   I'm on the TIM installation steps.  The Data Warehouse installed OK, but the Web Application fails.  Below is the error which leaves me pretty clueless.  I do have a support ticket open, but one of you may know the answer right away.  Let me know if you can shed any light on this error, shown in full below.
Thanks,
...Dave

Installing 'Analytics Web Application' using C:\ProgramData\TessituraTemp\Tools\Nant\Nant.exe.
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NAnt 0.91 (Build 0.91.3881.0; alpha2; 8/17/2010)
Copyright (C) 2001-2010 Gerry Shaw
http://nant.sourceforge.net
Buildfile: file:///C:/ProgramData/TessituraTemp/Tools/Installer.build
Target framework: Microsoft .NET Framework 4.0
Target(s) specified: tim.install.web
[macrodef] "buildFileList" New or Modified. Compiling.
[macrodef] "addEnvironment" New or Modified. Compiling.
tim.install.web:
install.analytics.web:
propertyguard:
[httpPing] Connecting to URL tessituraservices.tco.corp/.../TessituraWeb
[httpPing] Successfully connected.
[checkPort] Connecting to localhost on port 4433
[checkPort] Successfully connected.
[exec]
[exec] Pinging TCOStats.tco.corp [::1] with 32 bytes of data:
[exec] Reply from ::1: time<1ms
[exec] Reply from ::1: time<1ms
[exec] Reply from ::1: time<1ms
[exec] Reply from ::1: time<1ms
[exec]
[exec] Ping statistics for ::1:
[exec] Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
[exec] Approximate round trip times in milli-seconds:
[exec] Minimum = 0ms, Maximum = 0ms, Average = 0ms
[iisappexists] IIS Website "TessituraAnalytics" exists on server.
installwebserver:
[checkdrivespace] Drive has more than 3000000 KB available.
[copy] Copying 1 file to 'C:\ProgramData\Sisense\PrismFeature.xml'.
[copy] Copying 'C:\ProgramData\TessituraTemp\Components\TessituraAnalytics\Installer\PrismFeature.xml' to 'C:\ProgramData\Sisense\PrismFeature.xml'.
[copy] Created directory 'C:\ProgramData\Sisense'.
[xmlpoke] Attempting to load XML document in file 'C:\ProgramData\Sisense\PrismFeature.xml'.
[xmlpoke] XML document in file 'C:\ProgramData\Sisense\PrismFeature.xml' loaded successfully.
[xmlpoke] Selecting nodes with XPath expression '//*[local-name()='InstallationType'][*[local-name()='Name'] = 'PrismWeb_Feature']/*[local-name()='Selected']|//*[local-name()='InstallationType'][*[local-name()='Name'] = 'PrismWeb_Feature']/*[local-name()='IsChecked']|//*[local-name()='Feature'][*[local-name()='Id'] = 'IIsFeature']/*[local-name()='Selected']'.
[xmlpoke] Found '3' nodes matching XPath expression '//*[local-name()='InstallationType'][*[local-name()='Name'] = 'PrismWeb_Feature']/*[local-name()='Selected']|//*[local-name()='InstallationType'][*[local-name()='Name'] = 'PrismWeb_Feature']/*[local-name()='IsChecked']|//*[local-name()='Feature'][*[local-name()='Id'] = 'IIsFeature']/*[local-name()='Selected']'.
[xmlpoke] Updating nodes with value 'true'.
[xmlpoke] Updating node '0'.
[xmlpoke] Updating node '1'.
[xmlpoke] Updating node '2'.
[xmlpoke] Updated all nodes successfully.
[xmlpoke] Attempting to save XML document to 'C:\ProgramData\Sisense\PrismFeature.xml'.
[xmlpoke] XML document successfully saved to 'C:\ProgramData\Sisense\PrismFeature.xml'.
[xmlpoke] Attempting to load XML document in file 'C:\ProgramData\Sisense\PrismFeature.xml'.
[xmlpoke] XML document in file 'C:\ProgramData\Sisense\PrismFeature.xml' loaded successfully.
[xmlpoke] Selecting nodes with XPath expression '//*[local-name()='Feature'][*[local-name()='Id'] = 'IIsExpressFeature']/*[local-name()='Selected']'.
[xmlpoke] Found '1' nodes matching XPath expression '//*[local-name()='Feature'][*[local-name()='Id'] = 'IIsExpressFeature']/*[local-name()='Selected']'.
[xmlpoke] Updating nodes with value 'false'.
[xmlpoke] Updating node '0'.
[xmlpoke] Updated all nodes successfully.
[xmlpoke] Attempting to save XML document to 'C:\ProgramData\Sisense\PrismFeature.xml'.
[xmlpoke] XML document successfully saved to 'C:\ProgramData\Sisense\PrismFeature.xml'.
[echo] Installing Tessitura Analytics Web Application. This installation will run for about 30 minutes.
BUILD FAILED
External Program Failed: C:\ProgramData\TessituraTemp\Components\TessituraAnalytics\Installer\SiSense.7.1.3.10025.exe (return code was 1)
Total time: 8.6 seconds.
: Success : True, Message :
Exit Code : 1