Connection Timeout

Harald Schilly edited this page Nov 3, 2018 · 5 revisions

Timeout While Loading CoCalc

If you see the error message "Timeout while loading CoCalc." when you try to connect to CoCalc, there are several possible causes:

  • You are using a very old unsupported browser. Check for updates available to the browser you are using, or switch to the latest version of a different browser.

  • You are on a very slow network. Loading is going to work fine, but it takes more than 60 seconds. If you are on a slow network, loading may succeed after the timeout warning is displayed.

  • There is a temporary issue serving CoCalc, or an internal problem in CoCalc itself. If the reasons above don't apply, let us know by sending email to

There are more ideas what could go wrong here: Troubleshooting

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