in header, line 418 in /home/mydomain/domains/v3.mydomain.com/public_html/src/library/WebSite.php 
  called from seekquarry\yioop\library\WebSite->header, line 380 in /home/mydomain/domains/v3.mydomain.com/public_html/src/controllers/Controller.php 
  called from seekquarry\yioop\controllers\Controller->redirectWithMessage, line 1143 in /home/mydomain/domains/v3.mydomain.com/public_html/src/controllers/components/CrawlComponent.php 
  called from seekquarry\yioop\controllers\components\CrawlComponent->editCrawlOption, line 128 in /home/mydomain/domains/v3.mydomain.com/public_html/src/controllers/components/CrawlComponent.php 
  called from seekquarry\yioop\controllers\components\CrawlComponent->manageCrawls, line 555 in /home/mydomain/domains/v3.mydomain.com/public_html/src/controllers/Controller.php 

Hello I want to new page save. But error WARNING: Cannot modify header information - headers already sent by (output started at /home/mydomain/domains/v3.mydomain.com/public_html/src/controllers/components/CrawlComponent.php:1067) at line 418 in /home/mydomain/domains/v3.mydomain.com/public_html/src/library/WebSite.php in header, line 418 in /home/mydomain/domains/v3.mydomain.com/public_html/src/library/WebSite.php called from seekquarry\yioop\library\WebSite->header, line 380 in /home/mydomain/domains/v3.mydomain.com/public_html/src/controllers/Controller.php called from seekquarry\yioop\controllers\Controller->redirectWithMessage, line 1143 in /home/mydomain/domains/v3.mydomain.com/public_html/src/controllers/components/CrawlComponent.php called from seekquarry\yioop\controllers\components\CrawlComponent->editCrawlOption, line 128 in /home/mydomain/domains/v3.mydomain.com/public_html/src/controllers/components/CrawlComponent.php called from seekquarry\yioop\controllers\components\CrawlComponent->manageCrawls, line 555 in /home/mydomain/domains/v3.mydomain.com/public_html/src/controllers/Controller.php ...

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It is kind of hard to say without knowing more details of your set-up. What version of PHP are you running (I recommend 7.4 under Apache). What were you trying to do when you got that message? Best, Chris

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Thanks for your answer. Edit Crawl Options / Seed Sites add / Save Debian 9 / PHP 7.0