After update to itunes 12.3.3.17 can't update apps simultaneously
Today on march 22 updated to iTunes 12.3.3.17 as the Appstore showed me this update on Mac OSX included with Safari and 10.10.5 update.
After this update I can't update more than an iOS app at a time from iTunes. If I clic on Update all apps I get the message "Can't purchase XX app, the appstore is unavailable..." but if I update each app one by one everything goes fine and I can update all apps with no problem. This makes update process tedious as I need to clic on each app in order to update. In the download bar that appears when downloading apps the option "simultaneous downloads" is selected as always has been.
Any ideas? Thanks in advance.
iMac (27-inch Mid 2011), OS X Mavericks (10.9.2)