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
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