It's blank for me, too, on Debian with Firefox 127.0.1.
If I paste (star 50 "solid" "red") in myself, running it does work as expected.
I'm not sure if GitHub - bootstrapworld/wescheme: wescheme would be the right place to report this, since it seems to be an issue with inserting something into the WeScheme Definitions Area, rather than a problem with WeScheme per se. Maybe @sorawee would know how to pass this on to the right people?
Thanks @soegaard for confirming that it works somewhere, and @LiberalArtist for the reassurance that I'm not losing my mind ... doesn't work for me with current Safari/Firefox/Chrome/DuckDuckGo/Arc on Mac 14.5, or Safari 16.6.1 on Mac 11.7 (Intel), or Firefox on Raspberry Pi (Bookworm).
Thanks @soegaard for confirming that it works somewhere, ...
Well ... Turns out I just copy-pasted without thinking.
I thought the problem was, that the program didn't work in WeScheme.
I don't see anything in the definition window wither.