Workflow Engine 20.0.7

March 19, 2026

Overview

Workflow Engine 20.0.7 is a maintenance and preparatory release focused on Designer and Form Plugin reliability, safer Web API scheme validation, improved documentation, and upgrade readiness for Workflow Engine 21.0.

Why update

• Fix Designer and Form Plugin issues around localization, scheme switching, form name loading, and Show Form state restoration.
• Prevent invalid schemes from being saved through Workflow Engine Web API, reducing follow-up runtime failures.
• Surface compile-time warnings for APIs scheduled for removal in Workflow Engine 21.0 so you can prepare before the major upgrade.

Key features

• Web API now blocks saving schemes without an initial activity.
• Designer and Form Plugin fixes restore localization behavior, form name loading, associated commands, and saved form state from parameters.
• Public documentation now includes a strict CSP Designer guide and expanded API reference coverage, including plugins.
• APIs planned for removal in Workflow Engine 21.0 are marked as obsolete in 20.0.7.

Changelog

Update instructions

• All packages: update Workflow Engine packages to version 20.0.7.
• If you plan to upgrade to Workflow Engine 21.0, update to 20.0.7 first, rebuild your solution, and remove usages of APIs that now show [Obsolete] warnings.
• If you use public Web API samples or documentation snippets, replace PUT YOUR LICENSE KEY HERE with your own Workflow Engine license key. Request a license key from the Workflow Engine sales team at hello@optimajet.com.
• No database migration or other package-specific migration steps are required for this release.

Enhancements

• Core and related packages: marked entities and methods scheduled for removal in Workflow Engine 21.0 as obsolete to provide upgrade warnings one release earlier.
• Documentation: expanded API reference coverage to include plugins.
• Documentation and public Web API samples: replaced embedded license keys with placeholders and clarified how to request a license key.
• Documentation: added a guide for using the no-CSS Workflow Designer entrypoint in strict CSP environments.

Bug fixes

• Form Plugin: fixed loading of form names in the Show Form activity template.
• Web API: validation now prevents saving a scheme that does not contain an initial activity.
• Designer: fixed predefined localization application and aligned displayed localization selection with Approval History behavior.
• Form Plugin: fixed Show Form execution from parameters so callerElement, saved formData, and associated commands work correctly when reopening a form.
• Designer: fixed a crash when the Designer container is unmounted while changing a scheme.

Resources

• Strict CSP deployment guide: How to satisfy strict CSP in Workflow Designer?.
• API reference: Workflow Engine API reference.
• Web API setup: Workflow Engine Web API.
• License key information: License key.