LiteSpeed Cache- Cannot modify header information – headers already sent in vary.cls.php on line 735

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  • #42251
    krose
    Participant
    litespeed-cache

    was setup and running correctly prior to installing BPS Pro. Now the following warning is entered in the error log once per minute:

    [13-Nov-2022 02:53:38 UTC] PHP Warning: Cannot modify header information - headers already sent in /home/<user>/<site>/wp-content/plugins/litespeed-cache/src/vary.cls.php on line 735

    The site seems to be functioning fine, but this will obviously fill the logs very quickly. Is there a way to disable or whitelist this warning?

    #42252
    AITpro Admin
    Keymaster

    If you have WP_DEBUG turned on in your wp-config.php file then turn it off.  If that is not the cause of the php error then purge all LiteSpeed cache.  If that does not work then deactivate and activate LiteSpeed cache.

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