If you have fixed your products with errors and you still see the same errors after resubmission to Jet, you can simply ignore them. This is how Jet API works, once the error was triggered, it will stay there even if it is corrected. It is also a good idea to send an email to firstname.lastname@example.org and confirm with them that the data was corrected.
Also, very often missing price means that Jet catalog team is finding your price too high. You can do the research to find what other merchants ask for products similar or exact same as yours and lower your price accordingly to clear the error.