Code compilation Error from Assembly Compiler

[julianxfl]

Hey guys, i am currently trying around with some c# template from one of the users forum post.

https://zennolab.com/discussion/threads/avtomaticheskaja-zagruzka-soten-video-v-den-zastav-youtube-vzdrognut-2.95806/page-3#post-654552

Unfortunately i am getting the following error. Can someone interpret what does that mean?