I have looked at your XP11 Installer Log.txt file and the failure entry made was:-
28 for URL http://cds.n3w4x3c2.ssl.hwcdn.net/X-Plane%2011.36r2/directory.txt.zip
Following a bit of research, I have come across two previous posts from other simmers having the same, or similar issues.
In one case, it appeared the XP11 Installer application was out of date and surely enough, I can see that the version you are using is X-Plane Installer 4.02r2, which was compiled on Mar 3 2017!
I am currently using version X-Plane Installer 4.12r1 compiled on Feb 26 2019, which makes your version two years out of date.
I would therefore suggest in the first instance that you delete your current version of XP11 Installer and download the latest version from LR's website. Following that, try installing XP11 once again to see what happens.
In the other case, the simmer fixed the problem by deleting the C:\X-Plane 11\Resources\default data\CIFP folder, as it had a corrupt file inside it.
I wouldn't worry about the latter fix for now though, just delete the XP11 Installer app and download the latest version first.
As far as the other Log,txt file that you uploaded is concerned, this was XP11 Plane Maker and not XP11 itself, so I'm unable to do anything with this!
Hope this helps for now :-)