Can someone help me fix this error

Question

I'm not sure what's the problem or what the error means, you can run the code and see for yourself
This is a try out solution for the Spy Life challenge
Do not view the code if you didn't solve the challenge yet.

https://code.sololearn.com/c737c0XyGof7/?ref=app

Answer 1

Message.toCharArray have Array return type

Answer 2

Use char array in the front of where u used message.ToCharArray

Answer 3

I used lists because i wanted some practice on them, so it's not the optimal method of solving the challenge

Answer 4

elaborate? Aayush Saini

Answer 5

Ohhhh, thank you.
thanks for the help ^^