I’m getting a very similar error, and it seems to have popped up out of nowhere. I haven’t made any updates since the last time I was in the Admin CP.
Similar – the last time I was in the CP, about a week ago, I browsed other themes, but didn’t execute a change. But now I am essentially locked out, because I every time I go to /wp-admin I get this error message instead of access to my site.
I’m still not having any luck. Are you? By the way, who is your host? I wonder if this isn’t an issue caused by the host.
Mine is hosted by GoDaddy. I called them and they tried. I find that GoDaddy has excellent telephone support, but they couldn’t help with this one becasue it requires fixing code and the error message is locking us out. I am amazed that WordPress doesn’t offer ANY telephone support. They recommended using a search engine using the error message. This result was interesting https://ww.wp.xz.cn/support/topic/warning-cannot-modify-header-information-117?replies=8
but I don’t have FTP access tot he site set up, and I don’t have any backup files to work from.
It seems to have something to do with a stray space following a php tag in the code.
That’s what I’ve been reading too, but that doesn’t seem to be helping my case any. I think WordPress offers livechat, which is almost as good as telephone support.
A web-savvy friend told me to call my hosting platform (GoDaddy, which has great support) and ask them to reset my pages to a date before the error message started. I am going to try that. Let me know if you have any success with the livechat.
I use to see that error message all the time when I created php sessions. But, wordpress doesn’t use sessions.
I think the best solution would be to ftp into your site and remove all your from the plugin folder and see if the site comes up.
If you have access to your cpane there should be an icon on it to create an ftp user. You can download an ftp client install it.
Cpanel usually has an icon that will automatically configure the ftp client for you.
I hear you, but this error message comes up as soon as I enter the /wp-admin URL, effectively blocking me from getting into the backend of the site in any way… so i can’t get to my Cpanel.
cpanel has nothing to do with wordpress totally different applications. You should be able to get to cpanel by typing your domain name followed by /cpanel.
wordpress can’t keep you from getting to your cpanel.
I think I fixed my problem. I did quite a few things, so I’m not sure exactly which thing did the trick (maybe it was a combination of things?), but one thing to try is to go into Dashboard > Updates and click the Re-install Now button.
