Your software
My Mautic version is: 7.2.1
My PHP version is: 8.4
My Database type and version is: MariaDB
Your problem
My problem is: After composer upgrade to 7.2.1, which I understand was supposed to fix this problem, GrapesJS still fails to load.
When trying to open GrapeJS, popup says “Please enable the GrapesJS builder plugin (or another builder plugin) to use this feature.”
Going to plugins page, GrapeJS shows v1.0.0 (which doesn’t make sense that it would be only that) and Enabled/Auth toggle is Yes. Clicking “Install/Upgrade Plugins” says “0 new plugins were installed and 0 updated”
Cache was cleared during and after upgrade 7.2.0 to 7.2.1
These errors are showing in the log:
[2026-09-24T20:47:43.603642+00:00] app.CRITICAL: Uncaught PHP Exception Twig\Error\RuntimeError: “Key “0” does not exist as the sequence/mapping is empty in “@MauticCore/Helper/chart.html.twig” at line 2.”
Steps I have tried to fix the problem: