I'm keep getting this error when compiling but when it finishes the map loads up but nothing a radiant that i do shows up?

I'm getting this error as well, I did something on accident when messing with the smoothing layers and I have no idea what I did. Kinda annoying

Okay so I solved the issue. For me, the error was saying "unknown smoothing name 'clip," so I opened my .map file in notepad++ and pressed ctrl+f to search for "smoothing clip." Once I did that, about 12 results showed up, and I just deleted those words from the end of each line that they were in. I'm not exactly sure what causes this, but it's just an invalid property on brushes it seems like.