Welcome @nima.dehdilani
You jobs are currently queued. This is expected at all of the public Galaxy servers. Our best advice is to allow queued job to remain queued (grey) until they execute (yellow) and complete (green or red) → FAQ: Understanding job statuses. Deleting and rerunning places the new job back at the end of the queue again, extending your wait time, so please try to avoid this!
To check that the server itself is running Ok, you can review the current work. Thousands of jobs complete every hour, every day! You can use your browser find function to search by tool names too! → How to see the UseGalaxy.eu job queue statistics - #2 by jennaj
If you have an error, we can help with a review here if you share back your history. → FAQ: Sharing your History
We hope this helps and that your job has completed by now! 