Hello,
I have similary problem, I don't have linux root acces on my Rust server only a Hosting panel from the provider and an ftp acces, so i can't install a Lib.
I open a ticket to the provider and send your F.A.Q. link. Their answer is : the package has been installed on the system now! :)
The server run on
System
Name: 77026
OS: Linux 4.9 Debian 9.9 64bit
CPU
Model: Intel(R) Xeon(R) CPU E5-1650 v3 @ 3.50GHz
Cores: 12
Memory: 64321 MB
I delet signArtist Install again reboot server, then same message. So i decide to download on my pc the Lib, uncompress this with a software and finally got the libgdiplus.so.0. So I try to put everywhere on the ftp RustDedicated_data/managed etc.. but still doesn't work
How can I resolve this probleme ? (Sorry if you don't understand my english)