Are you also working at UseGalaxy.eu? If so, it looks like there are a few hundred queued jobs for SPAdes runs. If your queued datasets are gray in color, they are in that group.
I’m reviewing here
Screenshot of where to click
More about how jobs execute on the UseGalaxy servers and the public clusters.
If you want to share back your history we can help to make sure that the inputs are ready to use (not in a pending or error state) since that can also lead to a job staying in a queued state. How to share is in the banner at this forum.
If you are working at a different server, the statistics are usually about the same, but we can still double check. We need to know where are working and how the job is set up, the shared history links is still the best way to review for this but if you screenshot everything that can work too.
Hope this helps! 