Ubuntu Forge Error

[Mystaex]

Hi,

 

First of all, I'm not entirely sure if Linux is supported by Forge. However, I'm having a problem with launching my server for the first time. Whenever I run the command to start the server, I'm having the problem as shown in the first attached image:

 

To show the folder its in, as I saw online that may be an issue as to if the jar can find the server-jar:

 

It is Ubuntu 18.04 Desktop edition. I'm currently accessing it through XRDP (remote desktop). Other than the server and 1 or 2 other programs, there is nothing else on the machine.

 

Please let me know if you know how I could possibly fix this, or, if you could point me in the direction of someone who might.

 

Thank you!