Can't save app with error AppSerializer: SaveApp_internal caught extended exception -1: Unknown error"

[Sonja_Bauernfeind]

The user may receive Unknown error when saving app in Hub and notice the following Engine error in Windows event:

AppSerializer: SaveApp_internal caught extended exception -1: Unknown error

Environment

• Qlik Sense Enterprise on Windows 

Resolution

It is found that Windows Defender triggers this error. Please check Windows Defender or other security programs and then configure the antivirus exception as follows: Qlik Sense Folder And Files To Exclude From Anti-Virus Scanning

In below patches and more recent versions, we improved the engine behavior. We added a retry mechanism where a locked transaction file would cause Engine to fail when saving the app.

May 2021 Patch 16
August 2021 Patch 11
November 2021 Patch 9
February 2022 Patch 4
May 2022 Patch 1

Related Content:

How to troubleshoot the AppSerializer: SaveApp caught extended exception error