What's new in Mermaid Studio 2026.4.4?

Mermaid Studio 2026.4.4 is a bug-fix release. It fixes an error on the IDE’s 2026.3 EAP builds from 263.5701 on, where opening a project failed with a missing Jackson class and the preview did not load.

For the latest features, including Mermaid.js 12 support and the new use case and agentflow diagrams, see what’s new in 2026.4.2.

Changelog

Fixed

• Startup: the plugin no longer fails with a missing Jackson class error when opening a project on 2026.3 EAP builds from 263.5701