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Unable to change header information - headers already sent an error

I got an error, for example

Warning: it is not possible to change the header information - headers already sent (the output is started in / home / ktmbikes / public _html / wp-content / plugins / accessories / accessories.php: 256) to / home / ktmbikes / public_html / wp-includes / pluggable. php on line 934

can anyone say what is wrong?

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2 answers

The plugin file (Accessories) generates some output. Based on the position, I would suggest that this is an error message. Do you have WP_DEBUG enabled? Is this a custom plugin?

Is it possible to insert a block of code from line 256 into a plugin file?

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You have no place before or after <?or?>

UTF8

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