'The Jellyfin Tray Application Is Already Running'

[L I N]

I just added jellyfin for the same time. I tried to click the app and get started but this info message comes up but I cannot access this 'running application' to close it or use the app. I am just so frustrated. I have deleted and reinstalled. I have restarted my computer. I have waited for hours to see if it will sort itself out. HELP. Please I really want to start putting my movies on jellyfin and this is doing my head in.

Thank you.    

[TheDreadPirate]

What happens when you put "http://localhost:8096" in your browser?

[L I N]

           
Hey! Thanks for getting back to me. It shows me this! I'll give it a go and see what happens! Thanks again, you star!

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Ah no! It has an error message when I try to proceed with my login details

[TheDreadPirate]

Remove the spaces from the username?

And you've never run Jellyfin on this system?