setup:
Ubuntu 18.04.4 LTS
Server version: Apache/2.4.29 (Ubuntu)
1st I've replaced your domain with mine - I used this command to do so:
grep -rli 'old-word' * | xargs -i@ sed -i 's/old-word/new-word/g' @
2nd I've added also this in .htaccess file so it can load files without extensions
now everything seems to load fine except cant connect with key


you can try on https://xtemp3r.net/keystuff/