“JCEF is not supported” in the AWS Toolkit — what it is

Updated 17 August 2026

JCEF is the Chromium browser embedded in the JetBrains Runtime. Plugin screens that render web content need it. When the IDE runs on a JDK without JCEF, those screens cannot draw and the plugin reports that JCEF is not supported.

When it happens

The IDE was configured to run on a custom boot JDK that is not the JetBrains Runtime.
A stripped or non-standard runtime is in use, common in locked-down corporate images.

Fixing it

Switch the IDE back to the JetBrains Runtime: Help → Find Action → Choose Boot Java Runtime for the IDE, pick the bundled JetBrains Runtime (the one that includes JCEF), and restart. If your organisation pins the runtime, this is a request for whoever manages that image.

What still works without JCEF

Tool windows drawn with native IDE components — tables, trees, text panes — do not need an embedded browser. Only web-rendered screens are affected.

Disclosure

These guides are written by sellerkit. We publish JetBrains IDE plugins for AWS, and the ones relevant to this page are listed below. Everything above works whether or not you use them.

Our plugins declare no upper IDE build limit, and each release is run through the JetBrains Plugin Verifier against multiple IDE versions before it ships.