Title: UTM Tracking addon causing lighthouse error
Last modified: April 23, 2020

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# UTM Tracking addon causing lighthouse error

 *  [DJviolin](https://wordpress.org/support/users/djviolin/)
 * (@djviolin)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/utm-tracking-addon-causing-lighthouse-error/)
 * When I enable the UTM Tracking addon and running a Lighthouse audit, I’ve got“
   start_url does not respond with a 200 when offline The start_url did respond,
   but not via a service worker.” error. I tested with and without W3TC enabled.
 * Further examining the issue, I noticed the error message is gone if I visit my
   website’s URL with the: `?utm_source=superpwa` query string at the end. Is this
   how it should work? I’m testing in localhost SSL environment from browser.
 * Enabling W3TC causing a whole new issue: `?utm_source=superpwa` query string 
   not added at the end of the installed PWA in desktop Chrome.
    -  This topic was modified 6 years, 1 month ago by [DJviolin](https://wordpress.org/support/users/djviolin/).
    -  This topic was modified 6 years, 1 month ago by [DJviolin](https://wordpress.org/support/users/djviolin/).
    -  This topic was modified 6 years, 1 month ago by [DJviolin](https://wordpress.org/support/users/djviolin/).
    -  This topic was modified 6 years, 1 month ago by [DJviolin](https://wordpress.org/support/users/djviolin/).
    -  This topic was modified 6 years, 1 month ago by [DJviolin](https://wordpress.org/support/users/djviolin/).

Viewing 1 replies (of 1 total)

 *  Thread Starter [DJviolin](https://wordpress.org/support/users/djviolin/)
 * (@djviolin)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/utm-tracking-addon-causing-lighthouse-error/#post-12720013)
 * The last issue seems resolved, `?utm_source=superpwa` query string appears if
   I open the PWA from Chrome’s Applications tab.

Viewing 1 replies (of 1 total)

The topic ‘UTM Tracking addon causing lighthouse error’ is closed to new replies.

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 * 1 reply
 * 1 participant
 * Last reply from: [DJviolin](https://wordpress.org/support/users/djviolin/)
 * Last activity: [6 years, 1 month ago](https://wordpress.org/support/topic/utm-tracking-addon-causing-lighthouse-error/#post-12720013)
 * Status: not resolved