You have reached the inode limit of your hosting account

HumHub is indeed pretty big on inode usage, but I just checked it and a plain HumHub installation is roughly 40,000 inodes, so that’s still within the limit. So you can host HumHub with us. Just not multiple installations, and probably not along with other websites on the same account. If you reinstalled it multiple times and now hit the limit, I suspect that some of the previous installation attempts may have left lingering files in your account that are still using inodes. I suggesting removing every previous installation through Softaculous first, and then go into the file manager and clear out every website folder before trying again.