Error when launching a raycasting project from github (link missing)

Good day! I am a complete newbie to monogame and I decided to start my acquaintance with the engine by looking at this project: GitHub - ChrisSerpico/raycasting: Raycast engine built in Monogame/C# but I immediately ran into a problem. The project does not start and I think that the problem is in the missing link (a screenshot: 123 — ImgBB). This is a 2015 project, so maybe something has changed in the monogame during this time, but maybe the necessary files are missing on my computer. If anything, I installed monogame through a set of extensions built into visual studio. Does anyone have any idea how I can fix the issue other than by installing an older version of the engine? I haven’t tried it yet and don’t know if it will help, but I would really like to work with the current version of monogame anyway. Thanks in advance.