Workflow creation doesn't work

**Describe the bug**
Workflow creation closes the dialog, but the workflows page stays empty

Buzz Desktop version: v0.5.5
Relay:
wss://dunsocial.communities.buzz.xyz

Steps:
1. Open Workflows.
2. Click Create Workflow.
3. Fill required fields.
4. Add a Send Message step.
5. Click Create.

Expected:
Workflow appears in the Workflows list.

Actual:
Dialog closes successfully.
Workflows page remains empty.
Restarting Buzz does not make the workflow appear.
No error message is shown.