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Apologies, the lab could not be started in a timely manner. Please try again or contact us if the problem persists.

Nidhish | Last updated: Mar 23, 2022 11:32AM UTC

Getting this problem in the lab - https://portswigger.net/web-security/authentication/multi-factor/lab-2fa-simple-bypass

Nidhish | Last updated: Mar 23, 2022 11:35AM UTC

Its launching perfectly now. Sorry for the post.

Ben, PortSwigger Agent | Last updated: Mar 23, 2022 11:48AM UTC

Hi Nidhish, Do you have running or have you launched three labs in quick succession when you see this particular message? We have recently put a hard limit on the number of labs a user can run at any one time - this is set to three (please note that labs will continue to run for a period of time even if you close the immediate browser window). If you wait for around 15 minutes (so that any 'open' lab instances time out) do you see the same behaviour or can you then successfully launch further labs?

Mahesh | Last updated: Mar 28, 2022 09:03AM UTC

Same problem with : https://portswigger.net/web-security/cross-site-scripting/dom-based/lab-innerhtml-sink?lablaunchfailure=1

Ben, PortSwigger Agent | Last updated: Mar 28, 2022 09:11AM UTC

Hi Mahesh, That particular lab launches fine for us. The advice given to Nidhish above is still applicable - if you are running or have launched three labs in quick succession you will see this message when you come to try and launch a fourth lab (please note that labs will continue to run for a period of time even if you close the immediate browser window).

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