I get an uncaught type error

Question

When I run this https://code.sololearn.com/W2nL1rj0F4jN/?ref=app I get error this get the following message "Cannot read properties of Null Reading appendChild. Please help

Answer 1

id of <td> element contains lowercase (L) but you mis-typed it as '1' when passing it in btnFunction (third char from end)

see id on line 65 and value on line 57

Answer 2

Thanks so very much, such a stupid mistake

Answer 3

Happens! ;)