Hotfix Release
Unfortunately, the most recent Qlik security patches have introduced an issue related to WebSocket connections, which has a direct impact on Mail & Deploy’s connectivity. To solve this, we have released two hotfixes across the latest versions of Mail & Deploy to patch the reported issue.
Please note that only Qlik Sense Enterprise for Windows is affected.
Other Qlik products including Qlik Cloud and QlikView are NOT impacted, but if you connect Mail & Deploy SaaS or On-Premise to your client-managed Qlik Sense Version you will probably encounter the same issue.
RECOMMENDATIONS
To resolve this, we strongly recommend that customers upgrade their Qlik Sense Enterprise for Windows to a version that includes the necessary fixes and apply the corresponding Mail & Deploy hotfixes.
Download the hotfix for version 3.3.1 from this link:
Update (October 2026): this archive is no longer offered for download here. The fix is included in all later releases. If you still run version 3.3, contact support and we will provide it.
Download the hotfix for version 3.3.0 from this link:
Update (October 2026): this archive is no longer offered for download here. The fix is included in all later releases. If you still run version 3.3, contact support and we will provide it.
If you need help on how to install a Hotfix in version 3x, please read this: https://community.mail-and-deploy.com/en/support/solutions/articles/77000531442-how-to-install-a-hotfix-in-version-3
A hotfix for version 3.2.1 will be released shortly. We are also actively investigating the possibility of patching older releases.
We apologize for any inconvenience this may have caused you!
As we put customer experience on a pedestal, we will conduct more extensive testing to avoid such issues in the future.
If you have any questions, feel free to contact our Support Team.
