depends on proper session initialization but this is actually unchecked, so in case session handling is yet misconfigured (i.e. missing appropriate configuration entry) - this will throw unhandled exception what results in method failure. In the consequence, debug data file is never created and empty debug toolbar is presented with "Not Found (#404): Unable to find debug data tagged with…" message.
That happened to me when brand new application was just created with default config files. I could see "Congratulations! - You have successfully created your Yii-powered application." but debug toolbar was erratic.
I believe that is cosmetic - of course - but a bit nasty and should be corrected, so some more meaningful message suggested appropriate measures. Less experienced users can be easily puzzled with this error.
Nothing special, actually. I just decided to re-create my entire system form scratch with Windows 10, so I installed fresh system, fresh Apache with fresh PHP as FastCGI - just changed session.save_handler from “files” to “user”. Then I configured Apache to dynamic virtual hosts, installed Composer, installed Yii2 and various extensions to C:\Sites\vendor while actual application to C:\Sites\www\MyApp\protected and its ‘web’ folder to C:\Sites\www\MyApp\web, modified index.php and index-test.php to point to appropriate locations. I also added appropriate ‘vendorPath’ entry in the web.php config file.
Please notice, at this moment I did not yet configured database. When I checked my application in the browser (routing through modified ‘drivers/etc’ file) I could see the welcome screen but debug toolbar was faulty.
