JavaScript errors break the block editor and pages
JavaScript errors such as duplicate element registration and undefined values break the block editor or front-end.
Tier I · Proven The best-established problems.
7 public reports · first reported 16 March 2023 · last reported 1 September 2025
What's going wrong
Site owners see JavaScript errors in the browser console after installing this LottieFiles plugin, and these errors sometimes stop the block editor from loading or block content from validating. Some reports cite the same custom element being registered twice, which appears on newer WordPress versions and even when no Lottie block is used. Others describe undefined-value errors on every page, in the admin area, or in the tablet and mobile preview of the block. A few said the editor became unusable after adding a custom animation. Owners who are not developers cannot tell whether the cause is their theme or the plugin. The gap is a monitor that catches front-end and editor JavaScript errors per plugin and explains them in plain language.
AI-assisted: written with the help of AI from the reports.
Products affected
LottieFiles.
Related problems
Who has this problem
1 business found.
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