# Simulator not loading despite official domains being reachable

**URL:** https://forum.makecode.com/t/simulator-not-loading-despite-official-domains-being-reachable/41529
**Category:** Educators' Lounge
**Created:** [January 15, 2026, 6:03pm UTC](https://forum.makecode.com/t/simulator-not-loading-despite-official-domains-being-reachable/41529 "2026-01-15T18:03:12Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![Vegz78](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/vegz78/32/1201_2.png) [@Vegz78](https://forum.makecode.com/u/Vegz78)
#### Post date: [January 16, 2026, 6:48pm UTC](https://forum.makecode.com/t/simulator-not-loading-despite-official-domains-being-reachable/41529/3 "2026-01-16T18:48:44Z")

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Thx, @jwunderl!

I’ve forwarded your suggestions about iframe /cross origin to the IT department, but unable to check again on the student’s chromebooks until next week.

> [@I can no longer make Makecode Arcade games](https://forum.makecode.com/t/i-can-no-longer-make-makecode-arcade-games/32126/11):
>
> we get a lot of questions from teachers about what to tell IT admins when makecode is accidentally blocked so this would be a useful data point for me.

@richard: Did you get any useful data points you could share in this analog case with all required domains reachable, but the simulator still not loading?;

> [@I can no longer make Makecode Arcade games](https://forum.makecode.com/t/i-can-no-longer-make-makecode-arcade-games/32126/15):
>
> Here’s what it looks like for the simulator And here’s the domain tester page

Wish you all a great weekend on the other west coast (already weekend here…)! 😉

Br,  
Vegard

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