Title: Cannot modify header information
Last modified: November 23, 2021

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# Cannot modify header information

 *  Resolved [shadiadi](https://wordpress.org/support/users/shadiadi/)
 * (@shadiadi)
 * [4 years, 6 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-175/)
 * There is a problem with the plugin it produces an error.
    Cannot modify header
   information – headers already sent in The issue is there is an extra whitespace
   an empty line at the end of the /wp-content/plugins/litespeed-cache/src/vary.
   cls.php file. I removed it once and it fixed the issue, but after updating the
   plugin it is back again. Please remove this whitespace in your future updates.
 * Thank you

Viewing 1 replies (of 1 total)

 *  Plugin Support [qtwrk](https://wordpress.org/support/users/qtwrk/)
 * (@qtwrk)
 * [4 years, 6 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-175/#post-15097878)
 * Hi,
 * Could you please specify which line that is ?
 * Best regards,

Viewing 1 replies (of 1 total)

The topic ‘Cannot modify header information’ is closed to new replies.

 * ![](https://ps.w.org/litespeed-cache/assets/icon-256x256.png?rev=2554181)
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 * 1 reply
 * 2 participants
 * Last reply from: [qtwrk](https://wordpress.org/support/users/qtwrk/)
 * Last activity: [4 years, 6 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-175/#post-15097878)
 * Status: resolved