Retool App White Screen – Assets Failing to Load (ERR_CONNECTION_RESET)

💬 Account & User Management
1

We’re running into a blocking issue where all Retool surfaces fail to load from our office network:

  • Retool apps → white screen

  • Retool homepage / login → fails

  • Console shows repeated:

    • net::ERR_CONNECTION_RESET

    • Failed to fetch dynamically imported module

Important context:

  • Works perfectly from home networks

  • Works immediately when switching to hotspot / VPN

  • Fails for all users on our office network (WiFi + Ethernet)

  • DNS resolution works

  • Ping works

:magnifying_glass_tilted_left: What we’ve tested

curl -v https://retool-edge.com/assets_vjs/main-*.js

Has anyone seen ERR_CONNECTION_RESET + TLS handshake failures specifically with Retool domains?

3

We are having the same issue however its only affecting a couple of our offices.

1 Like
4

Same here. ERR_CONNECTION_RESET errors when loading public embedded apps. Cellular data from mobile no issues. Home office works fine. Brick & mortar locations are unable to load the apps.

5

Hey everybody - thanks for reporting! We are actively investigating this and sharing updates here.

6

Hey everyone, just sharing the workaround from the status page here for more visibility.

We've identified the issue is due to certain ISPs blocking the retool-edge.com domain. Confirmed ISPs are Comcast Business and Optimum (Altice USA / Cabelvision).

While we work on removing the ISP blocks, here is a workaround.

You can temporarily resolve this by switching to a trusted public DNS resolver such as 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google).

Mac:

  1. System Settings → Network → select your connection → Details
  2. Click the DNS tab
  3. Add 1.1.1.1 or another trusted DNS resolver
  4. Click OK

Windows 11:

  1. Settings → Network & Internet → select your connection (WiFi or Ethernet)
  2. Scroll down to DNS server assignment → click Edit
  3. Change to Manual, toggle on IPv4, enter 1.1.1.1 or another trusted DNS resolver
  4. Click Save

If you are not familiar with making these changes or your devices are managed by your organization, please reach out to your IT or infrastructure team for assistance.

We are actively working to resolve the underlying issue. We will provide updates as we have them.

1 Like