Code Connect "Something went wrong with the properties panel"

[InsideRaptor]

Environment:

• Code Connect: v1.3.4
• OS: macOS 15.6
• Framework: HTML/Web Components

Issue: Code Connect files publish successfully via CLI, but Figma Dev Mode shows "Something went wrong with the properties panel" error instead of displaying the connected code snippet.

Expected Behavior: Code snippet should appear in the Dev Mode properties panel after successful publish.

Actual Behavior: Properties panel shows error message (see screenshot below) despite successful CLI upload.

CLI Output (appears successful):

Validating Code Connect files...
All Code Connect files are valid (3771ms)
Uploading to Figma...
Successfully uploaded to Figma, for React:
->  https://www.figma.com....node-id=14344-1718

Code Connect File:

import figma, { html } from '@figma/code-connect/html'
figma.connect(
  'https://www.figma.com....node-id=14344-1718',
  {
    props: {
      size: figma.enum('size', { large: 'large', medium: 'medium', small: 'small' }),
    },
  example: ({ size }) => html`\
<vds-button size=${size}>
  Button
</vds-button>`
})

Additional Context:

• Node ID points to component set (not variant)
• Multiple refreshes of Figma don't resolve the issue
• Both code repository and Figma file are behind VPN/private access
• Tested on both Figma desktop app and web browser with same results
• Other team members are experiencing the same issue

Reproduction:

• Create HTML Code Connect file
• Run npx figma connect publish
• Navigate to component in Figma Dev Mode
• Observe error message in properties panel instead of code snippet

[christinabannister-figma]

Hello! Do you happen to see anything in the console of the browser when you see this issue?

[InsideRaptor]

We managed to get it working with the correct html parser, it was some config issue. But now, after i while, it randomly stopped showing it with no new code changes, and we are back on the error message.

Here is a screenshot of the console, a lot of connection errors and some other ones

.txt file with more logs console_logs.txt