Rundeck: Error 500 after changing project.disable.executions or project.disable.schedule parameters in project.properties

[MegaDrive68k]

Describe the bug
Error 500 if editing project.disable.executions or project.disable.schedule parameters in project.propertiesfile, occur on 3.2.7, and 3.2.8-SNAPSHOT.

My Rundeck detail

• Rundeck version: 3.2.7 / 3.2.8-SNAPSHOT
• install type: WAR
• OS Name/version: Ubuntu 20.04
• DB Type/version: H2

To Reproduce

1. Create a Project.
2. Go to Project Settings > Edit Configuration > Edit Configuration File (up to right button).
3. Change project.disable.executions or project.disable.schedule values and save it.
4. See error.

Expected behavior

Save the parameters on project.properties file.

Screenshot

Desktop (please complete the following information):

• OS: Ubuntu 20.04
• Browser: Firefox 76.0.1

Additional context

Full-stack error:

328.txt

[jtobard]

3.3.0-SNAPSHOT confirmed too

[gschueler]

(note: #6139 is the same issue for 3.3)

[gschueler]

fixed by https://github.com/rundeck/rundeck/pull/6149