Qlik Application Automation and Slack: Breaking changes November 12, 2025

[Sonja_Bauernfeind]

Slack has updated the deprecation date to November 12th, 2025 (originally March 11th).

Starting November 12th, 2025, Slack will enforce changes in their APIs affecting file uploads. To accommodate these breaking changes, we have introduced new blocks in the Slack connector for Qlik Application Automation.

What blocks are affected?

• Upload File To Channel (new version)
• Send Text Based file (new version)
• Send Binary File (deprecated)

What exactly is changing for Qlik Application Automation?

The Send Binary File block will be deprecated. Instead, use the Upload File to Channel block to upload binary files. If you still want to send a base64 encoded string, use the Send Text Based File block and configure the encoding parameter to base64.

The Upload File To Channel block and Send Text Based File block need to be updated to a new version. To perform this update, replace existing blocks with new blocks by dragging the blocks from the block library.

What will I need to do to mitigate this?

Any automation using affected blocks needs to be updated. 

See Breaking changes for file support in the Slack connector: new blocks introduced for steps and details.

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