Cannot modify header when calling wp-admin
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Since updating to WP 4.3 when I try to login w/Youtube-embed-plus (free) 10.5 activated, I get a list of some 16 “cannot modify header” errors that point to line 647 in Youtube-embed-plus and a line in pluggable.php, specifically lines:
431,444,957-962,965=968, and 971-974.The wp-admin accepts the userId/password, but login actually fails.
If I deactivate the Youtube-embed-plus pluggin, the errors go away, the login is allowed, but of course pages which contain links to YouTube videos don’t work.
Very old postings about the “cannot modify header” error suggests empty lines in wp-config, but that doesn’t appear to the be solution.
We do have WordFence (pro) running and I have tried deactivating all caching but that doesn’t solve the problem.
The site is standard Dreamhost using FastCGI with PHP 5.6.
TIA for ideas on resolving this.
Dave
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