Title: Admin Login Failed
Last modified: January 14, 2019

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# Admin Login Failed

 *  [claireliao90](https://wordpress.org/support/users/claireliao90/)
 * (@claireliao90)
 * [7 years, 4 months ago](https://wordpress.org/support/topic/admin-login-failed/)
 * Hi,
 * I can’t log into my admin today on web claireliao.org
    It shows an error below:
   Fatal error: Unknown: Cannot use output buffering in output buffering display
   handlers in Unknown on line 0
 * Could you please help me to fix it ASAP? I have to log in to post the daily blog
   to distribute on time.
 * Thank you so very much!
    -c
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fadmin-login-failed%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [7 years, 4 months ago](https://wordpress.org/support/topic/admin-login-failed/#post-11089871)
 * I somehow doubt this is autoptimize as that does not act on /wp-login.php or /
   wp-admin/, but if all else fails rename the `wp-content/plugins/autoptimize` 
   directory into e.g. `wp-content/plugins/autoptimize-old` using ftp or cpanel 
   or .. and AO will be automatically deactivated.
 * hope this helps,
    frank

Viewing 1 replies (of 1 total)

The topic ‘Admin Login Failed’ is closed to new replies.

 * ![](https://ps.w.org/autoptimize/assets/icon-256X256.png?rev=2211608)
 * [Autoptimize](https://wordpress.org/plugins/autoptimize/)
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 * 1 reply
 * 2 participants
 * Last reply from: [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * Last activity: [7 years, 4 months ago](https://wordpress.org/support/topic/admin-login-failed/#post-11089871)
 * Status: not resolved