ggplot doesnt have an error but its empty

Hi I typed this code a few weeks and ran just fine

but now i try to load it the exam same way with everything the same and now the graphic looks empty
What do i do?? please help

Very likely the problem is with your specific data. To help us help you, could you please prepare a reproducible example (reprex) illustrating your issue? Please have a look at this guide, to see how to create one:

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