I get an error message to say a job is in progress when it's not, so unable to start any new jobs

Did you have a chain going?

Potentially the same issue as https://cartelempire.online/Forum/6/7365 - so you'll need to poke vaelinn.

Thanks KWYY. 

No, don't have a chain going. Havent been able to start for hours, so any job that would have been going would have been long finished by now.