Since yesterday, we are having troubles to upload fastq files on galaxy.eu.
I am talking about relatively small fastq files (40Mb), which I was able to upload on other galaxy instances so far, and on galaxy.eu in the past.
I just tested local file Upload at UseGalaxy.eu. It was very fast for files of size 400 bytes. It was noticeably slower for files ~1.5 Mb but still worked.
Perhaps try with FTP? That can work better even for smaller files if the server is busy with other tasks at any particular time. How-to for this server: Galaxy Europe | FTP service instructions
Hope that helps! If not, write back and maybe provide a screenshot or two. It is night in the EU right now so expect a reply possibly over the weekend but more likely on Monday.