installation help

[thx1238]

hi, i try to install edumeet and got stuck by using the playbook command. os is debian11, every step as shown in the tutorial video works, but when i try to use "ansible-playbook -i hosts -u server1 playbook.yml", i get an "unreachable error" permission denied. the debian apache server/ init page is shown without problems, so i think the machine is reachable. i want to use an own instance for an art project and iḿ not an it pro. so any help would be appreciated. thanx!