Hi, I’am having a problem with my homework. I used to use the version 3.11 and the game worked perfectly, now I have to make the game responsive, so I moved to the last version of Phaser 3 and now if I play the game when I reach to the level 3, the game stops and the console says “cannot read property conatins”. This happens when you play any level and then you choose another level to play too, for exaplme if I choose level 2 and then I go to the level 1.
I need to fix this and keep the game with a responsive screen, that’s why I can’t go back to the previous version.
This is the repository link from GitHub https://github.com/IocusStudio/Heroes-de-la-Gripe
This is the link to play the game https://iocusstudio.github.io/Heroes-de-la-Gripe/
An image of the console 
Please help me. Thanks!.