Deprecated: Priority argument is now ignored - use the default of 100. You should really be setting routes via _config yaml fragments though. Called from . in /var/www/framework/dev/Deprecation.php on line 174
[User Warning] Couldn't set response type to 404 because of output on line 174 of /var/www/framework/dev/Deprecation.php
GET /site/?flushtoken=8d5f8b43d285c03cebe0b29037b78b10&flush=all

Line 262 in /var/www/framework/control/HTTPResponse.php
Source

253 					header("$header: $value", true, $this->statusCode);
254 				}
255 			} else {
256 				// It's critical that these status codes are sent; we need to report a failure if not.
257 				if($this->statusCode >= 300) {
258 					user_error(
259 						"Couldn't set response type to $this->statusCode because " .
260 						"of output on line $line of $file",
261 						E_USER_WARNING
262 					);
263 				}
264 			}
265
266 			// Only show error pages or generic "friendly" errors if the status code signifies
267 			// an error, and the response doesn't have any body yet that might contain
268 			// a more specific error description.

Trace

    Couldn't set response type to 404 because of output on line 174 of /var/www/framework/dev/Deprecation.php
    HTTPResponse.php:262
    SS_HTTPResponse->output()
    Director.php:189
    Director::direct(/site/,DataModel)
    main.php:176