Debug (line 154 of ModelAsController.php):
Using record #4 of type SilverStripe\ErrorPage\ErrorPage with link /page-not-found/
ERROR [User Warning]: Couldn't set response type to 404 because of output on line 141 of /srv/users/serverpilot/apps/pagebuildr-alpha/public/vendor/silverstripe/framework/src/Dev/Debug.php
IN GET /page-not-found?debug=1&isDev=1&isDevtoken=9d6e6af7427354ab4392c78952f8ce71
Line 336 in /srv/users/serverpilot/apps/pagebuildr-alpha/public/vendor/silverstripe/framework/src/Control/HTTPResponse.php
Source
======
327: } elseif ($this->getStatusCode() >= 300) {
328: // It's critical that these status codes are sent; we need to report a failure if not.
329: user_error(
330: sprintf(
331: "Couldn't set response type to %d because of output on line %s of %s",
332: $this->getStatusCode(),
333: $line,
334: $file
335: ),
* 336: E_USER_WARNING
337: );
338: }
339: }
340:
341: /**
342: * Output body of this response to the browser
Trace
=====
user_error(Couldn't set response type to 404 because of output on line 141 of /srv/users/serverpilot/apps/pagebuildr-alpha/public/vendor/silverstripe/framework/src/Dev/Debug.php, 512)
HTTPResponse.php:336
SilverStripe\Control\HTTPResponse->outputHeaders()
HTTPResponse.php:282
SilverStripe\Control\HTTPResponse->output()
index.php:18
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