Nope, it's fine here. Some guy had that problem on their Discord and he said it was because he had a conflict with another 152. Make sure sure you just have the latest version of the WB-Sim 152 in your community folder.
I see you're calling the file "host" instead of "hosts" (which is the correct name). Are you sure you have it with the correct name in your system? If you named it "host" it won't work.