[wp-trac] [WordPress Trac] #27974: Unable to Log In, Cookies Are Blocked Due To Unexpected Output

[WordPress Trac]

#27974: Unable to Log In, Cookies Are Blocked Due To Unexpected Output
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 Reporter:  dejong1968              |       Owner:
     Type:  defect (bug)            |      Status:  new
 Priority:  normal                  |   Milestone:  Awaiting Review
Component:  Login and Registration  |     Version:  3.9
 Severity:  major                   |  Resolution:
 Keywords:                          |     Focuses:
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Comment (by dejong1968):

 Thanks for your info. I'm getting closer to the solution. I use a WP-theme
 form themefuse.com I wanted some nglish text to be translated into Dutch,
 so with instructions of the themefuse-moderators, I modified a certain
 file. After that, the problem occured.
 What I did then was deliberately change the name of the plugins-map to see
 what the error code would be. When I went back to the login-page, i got
 this:

 +++begin errorcode
 Warning: Cannot modify header information - headers already sent by
 (output started at ../wp/wp-content/themes/medica-
 child/theme_config/widgets/TF_Widget_Contact.php:1) in ../wp/wp-login.php
 on line 414

 Warning: Cannot modify header information - headers already sent by
 (output started at ../wp/wp-content/themes/medica-
 child/theme_config/widgets/TF_Widget_Contact.php:1) in ../wp/wp-login.php
 on line 426
 +++end errorcode

 So that gave me the answer: this file is somehow corrupted. I have backups
 so I can restore this file to see what happens. I'm 99% sure this will
 solve it. But to make sure everything goes well, I'll do that together
 with the themefuse-moderators (when they're awake, it's 10.30 in the
 morning here in Holland).

 As soon as I'm any further on this, I'll report here.

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Ticket URL: <https://core.trac.wordpress.org/ticket/27974#comment:4>
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