When adding a new Entry, I'm having an error
Just based on your screenshot, my guess is the settings for your entry type for your "Jobs" section has "Show the Title field" unchecked and you've set the "Title Format" setting to be "jobs".

I'm not sure if you unchecked that box on purpose, but if you re-check it, you can manually set the Title (which the slug is auto-generated from on new entries) on a per-entry basis.