Our modifications to Snap4Arduino cause spurious warnings

[ToonTalk]

When launched from the UUI I see

And when I visit https://ecraft2learn.github.io/uui/snap4arduino/index.html

I see

Might be related to

No response from https://cs.uef.fi/~tapanit/ecraft2learn/api/pilot_2/get_s4a_script_pilot_2.php with users=K&sessionId=10

Neither happens when visiting http://snap4arduino.rocks/run/