Apple has started to roll out a new iOS 9.3.2 update to all the 9.7-inch iPad Pro devices. The new update is expected to bring the fix for the issue which was causing the iPad Pro to brick after the installation of original iOS 9.3.2 update. The bricking issue was reported by a number of iPad Pro users which left their devices showing "Error 56" after the update was installed.
Apple had not released any comment over the issue at that moment but it did pull back the update from all the devices. This new iOS 9.3.2 update has build number 13F72 and is available as an OTA update. You can check for the update manually by going to Settings and About device section.
While it is expected that the new update will fix the bricking issue, Apple has also uploaded a supporting document which talks about steps to be taken if someone's iPad Pro shows "Error 56" message after updating it to iOS 9.3.2 or later from iOS 9.3 or 9.3.1.