Workflow Engine 20.0.7

March 19, 2026

Important

Workflow Engine 20.0.7 is not usable in environments with Content Security Policy (CSP). If you use CSP, update directly to the hotfix release 20.0.8.

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 use Content Security Policy (CSP), do not stay on 20.0.7. Update to the hotfix release 20.0.8.
• 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.