1. If you want a useful answer you should provide all information about your installation, environment, etc.
Frankly, I absolutely don't understand such kind of posts. You've done something
[unknown] in your
[unknown] environment and something
[probably] went the way you don't like... Ok... And how could anyone help you? Say something like 'our thoughts and prayers are with your web server'?
Check your error logs. Maybe there will be some related messages.
2. The subject says '
all plugins', but you mentioned only
one plugin you've tried to install. Have you tried different plugins?
3. The downloadable and ready to be installed distribution of this plugin is here:
https://mibew.org/plugins#mibew-autoinviteIf you want to build the plugin on your own, follow this instruction:
https://github.com/Mibew/auto-reply-plugin#build-from-sources