Error accessing /list/admin

Downloaded PHPlist3.5.2, edited config (as I’ve already done in the past. The script definitely connects to the database, but then entering URL: creates an error:

This page isn’t working* is currently unable to handle this request.

Used PHPLIst in the past, never encountered anything like that. What could it be?

As there is nothing there for me, even Show Source shows nothing, I would have to guess you have missed a “;” semicolon somewhere when editing the config file?