Your ROOT_URL in app.ini is https://git.bwnetwork.us/ but you are visiting http://git.bwnetwork.us/Administrator/Proxmox_Helper_scripts/blame/commit/591491d5fb9ba7b48a04eb1ba40985f65efbeed2/install/fhem-install.sh
You should set ROOT_URL correctly, otherwise the web may not work correctly.
#!/usr/bin/env bash
# Copyright (c) 2021-2023 tteck
# Author: tteck (tteckster)
# License: MIT
# https://github.com/tteck/Proxmox/raw/main/LICENSE
source /dev/stdin <<< " $FUNCTIONS_FILE_PATH "
color
verb_ip6
catch_errors
setting_up_container
network_check
update_os
msg_info "Installing Dependencies"
$STD apt-get install -y curl
$STD apt-get install -y sudo
$STD apt-get install -y mc
$STD apt-get install -y avahi-daemon
$STD apt-get install -y gnupg2
msg_ok "Installed Dependencies"
msg_info "Setting up Fhem Repository"
curl -sSf https://debian.fhem.de/archive.key | gpg --dearmor >/etc/apt/trusted.gpg.d/debianfhemde-archive-keyring.gpg
echo 'deb [signed-by=/etc/apt/trusted.gpg.d/debianfhemde-archive-keyring.gpg] https://debian.fhem.de/nightly/ /' >/etc/apt/sources.list.d/fhem.list
msg_ok "Set up Fhem Repository"
msg_info "Installing Fhem"
$STD apt-get update
$STD apt-get install -y fhem
msg_info "Installed Fhem"
motd_ssh
customize
msg_info "Cleaning up"
$STD apt-get autoremove
$STD apt-get autoclean
msg_ok "Cleaned"