Cannot Upload Data .zip file

Greetings,

I'm struggling to upload my .zip file with my raw spectra for NMR analysis. I uploaded this file previously but wanted to try running my workflow again and now I keep getting this error:

"Unable to run job due to a misconfiguration of the Galaxy job running system. Please contact a site administrator."

I'm fairly sure the data is in the right format so any suggestions would be much appreciated.

Many thanks,
JM