cezanne | project showing varied shading algorithms with a simple | Graphics library

The idea is the following. when I start the app it goes to the method of loading data. Search for the file if there is a load from it if you do not load the array with the data that I have given it. When you click on the button to save in SD, you will create the file in the app folder in the SD. I leave my code. The method of writing doesn't give an error but I don't know if it's okay. in loading data I get this error

I am making a program that gives you a list of artists to choose from and when you click on the artist it opens a new window and gives you a selection of their paintings. However, when I try to do this nothing happens on the new window. I can't put any buttons on it and even static text doesn't work on it, it works just fine on the parent window, but not the child window. Am I missing something or do I need to do something else completely? Here's my code:

I need to align content in one of the columns in html like on the picture. But for some reason, even with the right code, it's not working for me. Instead of the content being close to the image, it's away from it. Can anyone tell me where is my error or what I'm doing wrong? Attached below are the code and image of what it should look like. Would appreciate any help! Here is the link to the github and picture: