Having this problem with the Corel Toast Burn App. All my other Apps downloaded no problem (iWorks, iLife, Corel Toast DVD and Corel Toast Audio) but this app refuses to download with Toast Burn failed to download... yadayada.
I have cleared the temp directory AppStore folder, rebooted, signed out, checked for downloads, etc, etc, etc.
The manifest.plist has the raw download URL which I copied and pasted in Safari and I get "Error - File can not be processed". The actual App is in the temp directory AppStore folder with a file size of zero kb.
My machine was rebuilt on day one of 10.11 with OSX Server and this App failed to download. I have since rebuilt the machine twice using standard 10.11 and again this one App refuses to download and install. Clean install in all cases (HDD completely formatted booting form an El Capitan USB boot disk). I have tried logging on using my Apple ID on work machines (10.10 and 10.11) and in all cases Toast Burn will NOT download with the same error.
Have been to-ing and fro-ing with a help rep who now insists that I have to phone in and they will advise me of the "complimentary and fee-based" support. Really? Without any evidence of assisting I need to pay? The problem is not our machines guys, I am very very sure that there is a serious issue with the Mac App Store (the logs are all there). Of course, let's try and convince Apple of that!
A.
BTW - heck if i'm paying to fix a server problem for Apple. I hardly get paid to fix my server issues!!!