Laravel support / composer issues

I need to help with solving a composer issue I have. I can run composer, it says that install is succesful but vendor-folder is empty and I get error:

[RuntimeException]
Could not scan for classes inside “/home/vagrant/code/vendor/nuovo/spreadsheet-reader/./” which does not appear to be a file nor a folder

I am using vagrant + virtualbox + homestead on a windows 10 machine