Help with barplot

Hi, I'm quite new to R, so I only know the basics.

I've been trying to plot the graph below. However, I don't know why the y-axis is not showing as numbers. Could someone also help me with renaming group names.

Thanks in advance!

Hi!

To help us help you, could you please turn this into a proper reproducible example (reprex) illustrating your issue? Please have a look at this guide, to see how to create one: