Error Message on Rocket Chat

[bdeoliv113]

Rocketchat opens and shows a blank window with the following message: "Don't panic!
This is a SockJS hidden iframe. It's used for cross domain magic."

[coderabbitai]

📝 CodeRabbit Plan Mode

Generate an implementation plan and prompts that you can use with your favorite coding agent.

• Create Plan

Examples

• Example 1
• Example 2

---

🧪 Issue enrichment is currently in open beta.

You can configure auto-planning by selecting labels in the issue_enrichment configuration.

To disable automatic issue enrichment, add the following to your .coderabbit.yaml:

issue_enrichment:
  auto_enrich:
    enabled: false

💬 Have feedback or questions? Drop into our discord or schedule a call!

[Devnil434]

can I work on this issue

[Gourang12332]

Hey , this is not an error. Sockjs has hidden iframes to ensure real time connectivity within browser and server. If you sometime got directed to these hidden frames rather than the main url , then it shows don't panic message.

Can u assign me this issue.

[anumukul]

Hi, I’d like to take this issue and can deliver a fix within 24 hours.
I’ve worked on similar projects before and have relevant experience, so I should be able to handle this efficiently.

[Kalpana-chavhan]

Hi @bdeoliv113,

I’ve looked into this issue. The message you’re seeing,
"Don't panic! This is a SockJS hidden iframe. It's used for cross domain magic."
is not an actual error. It appears because Rocket.Chat uses SockJS for real-time connections, and the hidden iframe is part of that mechanism. The message shows up if the iframe URL is accessed directly instead of the main Rocket.Chat app page.

Approach to fix/handle this issue:

Ensure users are opening the main Rocket.Chat URL (not the SockJS iframe URL).
Clear browser cache and cookies, then reload the app.
Check the server/reverse proxy configuration (e.g., Nginx) to ensure /websocket and other Rocket.Chat endpoints are routed correctly.
Update Rocket.Chat and dependencies to the latest stable version.
I can help implement these fixes if the team agrees. thanks!