Thanks for reporting these findings. Regarding the FileSystemAccessAllowedPaths issues, I can't repo this unfortunately and we tested this quite carefully before launch so I am wondering how we can look into this. Is it OK to contact you directly to try and dig a little?
Regarding the lack of useful error message with 'C:\QlikSense\SourceData\*', could you confirm you checked the QWC Service startup log in the root folder? There should have been a message there..
Thanks for your prompt response. Happy for you to contact directly to arrange a screen-share.
The error message is present and correct there as you suggest:
25/01/2018 11:21:20 OnStart:ERROR: System.Exception: There was an error processing the FileSystemAccessAllowedPaths element of deploy.config (Error adding path 'C:\QlikSense\SourceData\*' to whitelist (Illegal characters in path.))
I didn't look too hard for this previously, as I knew the last change I had made to the config, so was able to put it back to a working state straight away.
Just a couple of notes regarding people having issues with the FileSystemAccessAllowedPaths setting.
 We have been reviewing some other reports of this recently and they turned out to be because the user account running the QWC exe/service did not have permissions to access the file in question (I think we can improve our error messaging here to make it clearer what is going wrong). This is important, for QWC to access a file it is a pre-requisite that this user account has permissions on that path/file. The FileSystemAccessAllowedPaths gives an extra layer of defence/control.
 You cannot set the FileSystemAccessAllowedPaths element to something like:
It should be:
The * can only be used on its own, i.e.:
And this tells QWC to whitelist all file paths.
Hi Chris - thanks for the update. It's not clear that you shouldn't put the * at the end of the path, and it's a reasonable thing to assume will work (seeing there is the example of having just * in the config file).
Now I know that putting a path without a * will do all folders underneath though all is good.