Hello, I just istalled on Debian using https://webwork.maa.org/wiki/Automatic_Installation_Script_Guide and have 2.15 version.
The installation was almost smooth. Out of the box the apache2 server did not start and I had to download and install maybe two perl modules. One of them was from dpkg found on unstable branch. Also mathjax did not work and I had to switch the branch as described in istructions for manual installation.
Registration form for new server seems not to work.
There are detailed instructions at https://webwork.maa.org/wiki/Installation_Manual_for_2.15_on_Ubuntu_20.04_Server
If you will be setting up a virtual machine, you can download the virtual machine which has been tested on VMware, VirtualBox and QEMU/KVM. See https://webwork.maa.org/wiki/Installing_from_WW2.15_Ubuntu20.04_Server_Virtual_Machine_Image