i'm doing a fresh install (my first) of dokuwiki. i'm getting the "./data/pages is not found." error. my permissions seem fine. i've chowned http:http recursively. i'm using nginx on archlinux but installed with a downloaded tarball instead of the arch linux package.
have you double checked that "http" is really the nginx user on your system and not maybe the apache user that you selected out of habit? (something that would totally happen to me)
Mar 18 09:22:02 niyama nginx[56312]: 2020/03/18 09:22:02 [error] 56312#56312: *6 FastCGI sent in stderr: "PHP message: PHP Warning: Directory ./data/pages found at /usr/share/nginx/webapps/dokuwiki/data/pages, but it is not writable by webserver. in /usr/share/nginx/webapps/dokuwiki/inc/init.php on line 359" while reading response header from upstream, client: 127.0.0.1, server: wiki.niyama,