Hello,
when a file dropzone has permitted extensions/file types specified, and you drop a file on it that does not match those extensions, an error is displayed. The error is somewhat confusing.
Here's the dropzone config:
Here's the error when dropping something other than .xlsx or .xls:
(only one file was dropped)
Hi @hansontools, To upload multiple files, simply enable the multiple file option by choosing the appropriate selection type.
Perhaps I wasn't clear.
When you specify File types, say ['xlsx', 'xls', 'csv'], and then drop a file on the dropzone that is not one of those file types, like a .pdf, the error notification says:
"Only a single file may be uploaded at a time."
The error should probably read:
"This file type is not supported."
Hi @hansontools, thanks for surfacing this issue! We created a bug report and will update you here when is fixed. 
