Support » Fixing WordPress » Cannot login and error appears cannot modify header information

  • I am not able to login in as admin.
    It shows the error as below and also shows cookies are blocked.

    Please tell me how to fix it..

    Deprecated: idn_to_utf8(): INTL_IDNA_VARIANT_2003 is deprecated in /home/wallsaba/public_html/wp-content/plugins/amp/includes/class-amp-http.php on line 233

    Warning: Cannot modify header information – headers already sent by (output started at /home/wallsaba/public_html/wp-content/plugins/amp/includes/class-amp-http.php:233) in /home/wallsaba/public_html/wp-login.php on line 496

    Warning: Cannot modify header information – headers already sent by (output started at /home/wallsaba/public_html/wp-content/plugins/amp/includes/class-amp-http.php:233) in /home/wallsaba/public_html/wp-login.php on line 512

    Warning: Cannot modify header information – headers already sent by (output started at /home/wallsaba/public_html/wp-content/plugins/amp/includes/class-amp-http.php:233) in /home/wallsaba/public_html/wp-includes/functions.php on line 6029

    Warning: Cannot modify header information – headers already sent by (output started at /home/wallsaba/public_html/wp-content/plugins/amp/includes/class-amp-http.php:233) in /home/wallsaba/public_html/wp-content/plugins/jetpack/modules/sso.php on line 570

    Warning: Cannot modify header information – headers already sent by (output started at /home/wallsaba/public_html/wp-content/plugins/amp/includes/class-amp-http.php:233) in /home/wallsaba/public_html/wp-content/plugins/jetpack/modules/sso.php on line 581

    Warning: Cannot modify header information – headers already sent by (output started at /home/wallsaba/public_html/wp-content/plugins/amp/includes/class-amp-http.php:233) in /home/wallsaba/public_html/wp-content/plugins/jetpack/modules/sso.php on line 592

Viewing 3 replies - 1 through 3 (of 3 total)
  • Try to deactivate the plugin that causes the first error. More information:

    Login Trouble

    I’m having a problem very similar. I have this error when trying to login:

    Warning: Cannot modify header information – headers already sent by (output started at /home2/mgyasie/public_html/wp-content/themes/guava/inc/theme-function.php:110) in /home2/mgyasie/public_html/wp-login.php on line 496

    Warning: Cannot modify header information – headers already sent by (output started at /home2/mgyasie/public_html/wp-content/themes/guava/inc/theme-function.php:110) in /home2/mgyasie/public_html/wp-login.php on line 512

    Warning: Cannot modify header information – headers already sent by (output started at /home2/mgyasie/public_html/wp-content/themes/guava/inc/theme-function.php:110) in /home2/mgyasie/public_html/wp-includes/functions.php on line 6029

    Warning: Cannot modify header information – headers already sent by (output started at /home2/mgyasie/public_html/wp-content/themes/guava/inc/theme-function.php:110) in /home2/mgyasie/public_html/wp-login.php on line 891

    Warning: Cannot modify header information – headers already sent by (output started at /home2/mgyasie/public_html/wp-content/themes/guava/inc/theme-function.php:110) in /home2/mgyasie/public_html/wp-includes/pluggable.php on line 1265

    Warning: Cannot modify header information – headers already sent by (output started at /home2/mgyasie/public_html/wp-content/themes/guava/inc/theme-function.php:110) in /home2/mgyasie/public_html/wp-includes/pluggable.php on line 1268

    Help would be appreciated

    @charlotteabia you better start a new topic if this problem is still actual.
    You need to look what you have on row 110 (possibly to look through whole function and put on on topic too) in file which coursed error (theme-function.php)
    When you will start this new topic, post a link to your webs-site.
    If you have a premium theme, you can ask it’s support.
    Usual solution is to switch themes, but most times it isn’t so easy, because it will turn your site appearance into something completely different.
    Possibly you can remember when it started – you made some update, moved the website to different hosting, switch PHP version etc. and can undo it.

    @webfuelcode, sorry about this

Viewing 3 replies - 1 through 3 (of 3 total)
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