Invalid argument supplied

Thanks I’ll take a look

It seems to be the callback for the multicheck callback in EDD core. I’ve just fixed it and will submit PR.

To anyone else who notices this error, it only occurs when there are no download categories setup. Adding a category will remove the notice

Thanks Sumobi for fast reply. I’ll already added category and started testing more.

Ps, this has been fixed in EDD 1.9.2