Not sure if this helps anyone else but I reformatted my LanTurtle and updated to the latest version, but I noticed the module manager doesn't work anymore. I found that it's referencing lanturtle.com which is no longer active. I was able to get it to work by replacing the all the URLs using https://raw.githubusercontent.com/hak5/lanturtle-modules/gh-pages/modules. Example BASE_URL='https://raw.githubusercontent.com/hak5/lanturtle-modules/gh-pages/modules' There should be two places to replace, once in the function module_directory and the other in the update_modules.
In addition, for all the lines with wget, add "--no-check-certificate" without the quotes right after $module with a space. This bypasses certificate verification.
For example "wget -q $BASE_URL/$module --no-check-certificate -O /etc/turtle/modules/$module"