I have a multicraft server, and was wondering if I could install Pocketmine-mp on it, I have full FTP access and I can upload custom jars.
Then, you can only ask them to add it. In order to add a JAR, you need ROOT access to the Machine / Server to push in the .phar.conf file to allow the server to load the phar.
The host might have fixed the multicraft issues with jar/conf paths/permissions; I think it's worth asking the host anyway.
Yep.. I think VG and some other hasn't fix the permissions/paths. Anyways, just ask your host to get the real answers than we all assuming stuffs.