Re: No theme with tiki 13.1 ?
If I am reading between the lines that there is a possibility that the themes are not showing up in the drop down menu in Look and Feel, then there may be another culprit going on here.
When I uploaded both Tiki 13 and 14 to my shared hosting environment, niether of the installations had themes in the drop down menu at "Look and Feel" but for the default bootstrap. Each time I tried to re install I was hoping something would give and just right itself, I had zero luck in getting the themes to pop. Actually my main issue was with 13, because once I figured out the problem then 14 was a breeze to fix.
The issue was not with Tiki, it was with my shared hosting providing too many or too little folder and file permissions. When I was shopping for a hosting provider that carried php5.5 I had a chance to try Tiki 13 on two other shared hosting providers, and the permissions lined up beautifully upon installation. But when I finally decided on another provider for other reasons I had not performed a test run with Tiki 13 and I pulled the trigger, paid up on the first year, thinking that hey if they carry php5.5 then it's going to work as well as the first two tests I made on the other providers server.
I am very satisfied with my new provider, but there is just the little issue of setting the permissions. My current provider assigns perms differently, not a big deal, you just need to be aware that it happens
Check your permissions in order for Tiki to be able to access your folders and files appropriately. Run the setup.sh via shell per this document at https://doc.tiki.org/Upgrade#SuPHP_Problems
The shell command as noted at the above link will set all your file and folder permission approriately.
But, this may not be the issue at all, if you are just simply not seeing the themes in the proper folder then there is something else going on.