Hello, the TypeScript Playground seems to be broken, but the JavaScript one is working.
Here’s a screenshot of the issue:
I also tried to Disable Cache with the DevTools, but I had no luck 
Welcome on the forum 
Please to a research before posting 
Investigation in Progress about broken TS
++
Tricotou
2 Likes
Oops, I tried to search for the error code and I found a post from the February 20th , the one you linked didn’t appear in the search results. Thanks!