getting function error suddenly code that works fine

I Am learning javascript and everything was fine until I Add more functions
that not related to other functions already exist and it starts returning bugs in console for functions that there was no error for them therefore code is alright beacuse in tutrial it works just fine so Im using live server extension and vs code i already changed vs code to atom and it does not make any differnce so the errors come form no where for find method or innerhtml