As you can see above Validate fails. Let’s go back, do a different problem, then come back.
That one works. So let’s go back to the original problem.
No changes, now it works.
That was happening in class this morning. About 20% of the kids could not validate their work even though it was correct.
I was able to reliably repeat the error by opening up my choice of activity, followed by immediately pressing Validate. It fails. After I add code and run it, pressing Validate will not pass. If on the other hand I open the activity, add the correct code, run, then Validate it will pass.
ChromeOS version 140.0.7339.229 using the Chrome Browser.