computer reset. gain access to server

[5-0]

my windows 10 pc just reset itself. all the files were saved on the computer but apps were deleted. I can find the jellyfin folders of the cache and logs and all of that. when i downloaded the jellyfin app again and tried to log back into the server it was like it didnt exist. the only option it allows me to really do is start a new server. is there a way to get my original server back up?

i currently have v10.10.7 and use an external hard drive for my media. 

i am also new to this and have hit a wall on what to do.

thank you for your time

this is the error message im getting