All possible icons are displayed on the JEditor's toolbar; changing toolbar settings in JEditor Configuration > Toolbar doesn't affect anything.
JEDITOR_CONFIGURATION_JIRA is undefined error appears in the browser console.
JEditor conflicts with a module of another add-on - Insight (Asset Management). This module is also an editor that loads its own configuration and breaks JEditor.
The problem has been fixed in JEditor 3.2.0.
Starting with JEditor 3.2.0, the problem is fixed and JEditor should co-exist with Insight - Asset Management without issues. For earlier versions try the following workaround:
Disable the module that causes the conflict
- Go to JIRA administration > Add-ons > Manage add-ons
- Locate Insight - Asset Management and expand add-on's list of modules
- Find module named CK Editor(ckeditor) and disable it
After that, JEditor should start working properly. There will be a minor impact on Insight's textarea - it may be displayed as a plain text field or as a JEditor's instance.