Plot coming out squished or wrong

Hi everyone,

I had this piece of code working before but as I try to run it now, i get a squished output for the plot and when I restart my jupyter-lab, the plot becomes bigger but with one point instead of a line. Any idea how to fix this? I tried many resizing lines but all didn’t change the plot. Thank you so much for your help!


I get this other warning message, too.