Fix the error?

Question

So if an error occurs in this code, it displays "Error". However, pressing "=" again causes it to print "function Error() { [native code] }" to the display. How can I fix this?

https://code.sololearn.com/WxqL0XO8wqhD/#html

Answer 1

I may have figured it out.

https://code.sololearn.com/WxqL0XO8wqhD/#js