I followed a 3rd party guide that only gets you to the point of running, it doesn't even mention installation/configuration.
After defeating the bs that is this webhost provided system I got ahead of myself, made changes to start page, added local.php by hand, and now that I realized I need to use the installer, install.php throws 403 Forbidden nginx error.
I went ahead and unpacked the tar and put it into place again after reading "(For security reasons it will only work with a new and unmodified DokuWiki installation.)", but still nothing.