PLEASE someone reply to this if they know the solution. I know MG-RAST is no longer actively supported but I see people still uploading their data successfully. I have tried multiple things to get the metadata to validate: downloaded the excel file and reupload, fill in everything on the metazen user interface, try changing the extension to .xls, etc. Nothing I try seems to work but I fill out all the metadata thats header is red. Does anyone know the soultion to this problem?