Answers.Body: <p>Hello and thanks Brad !</p>
  
  <p>I was actually using Firefox. When I tried to install Craft 3 via Chrome (which has never gone to the website before) the issue was solved and I could access to the next page. Should be a cache issue !</p>
  
  <p>Thank you !</p>
  
  <p>Olivier.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2018-04-16T11:39:58.590Z
Answers.LastActivityDate: 2018-04-16T11:39:58.590Z
Answers.UserDisplayName: Holino
Body: <p>I try to install Craft 3 but I encounter an issue at the very beginning.
  I uploaded the CMS via FTP and completed manually the .env file. When I try to run the installation, I get stuck at the account creation (the second step…) I want to create my account but the next button is doing nothing.
  I get an error 400 "Bad Request // Unable to verify your data submission." When I send the form to create the admin account (POST to <a href="http://mywebsite.com/web/index.php?p=admin/actions/install/validate-account" rel="nofollow noreferrer">http://mywebsite.com/web/index.php?p=admin/actions/install/validate-account</a>).</p>
  
  <p>The server meet the requirements of Craft CMS (runned the server check and was ok). The DB connection is fine.</p>
  
  <p>I tried to delete and reupload all the CMS but nothing changed.</p>
  
  <p>Therefore, I'm unable to install Craft :| I saw some topics of the same issue but they're all unanswered.</p>
  
  <p>Thanks a lot !</p>
  
  <p>Here are the corresponding logs :</p>
  
  <pre><code>            2018-04-13 06:05:42 [2a02:a03f:3c1f:a00:6826:543f:275d:d8d5][-][-][error][yii\web\HttpException:400] yii\web\BadRequestHttpException: Unable to verify your data submission. in /home/MyWebsite/www/vendor/yiisoft/yii2/web/Controller.php:166
              Stack trace:
              #0 /home/MyWebsite/www/vendor/craftcms/cms/src/web/Controller.php(53): yii\web\Controller-&gt;beforeAction(Object(yii\base\InlineAction))
              #1 /home/MyWebsite/www/vendor/yiisoft/yii2/base/Controller.php(155): craft\web\Controller-&gt;beforeAction(Object(yii\base\InlineAction))
              #2 /home/MyWebsite/www/vendor/craftcms/cms/src/web/Controller.php(74): yii\base\Controller-&gt;runAction('validate-accoun...', Array)
              #3 /home/MyWebsite/www/vendor/yiisoft/yii2/base/Module.php(528): craft\web\Controller-&gt;runAction('validate-accoun...', Array)
              #4 /home/MyWebsite/www/vendor/craftcms/cms/src/web/Application.php(238): yii\base\Module-&gt;runAction('install/validat...', Array)
              #5 /home/MyWebsite/www/vendor/craftcms/cms/src/web/Application.php(446): craft\web\Application-&gt;runAction('install/validat...', Array)
              #6 /home/MyWebsite/www/vendor/craftcms/cms/src/web/Application.php(410): craft\web\Application-&gt;_processActionRequest(Object(craft\web\Request))
              #7 /home/MyWebsite/www/vendor/craftcms/cms/src/web/Application.php(147): craft\web\Application-&gt;_processInstallRequest(Object(craft\web\Request))
              #8 /home/MyWebsite/www/vendor/yiisoft/yii2/base/Application.php(386): craft\web\Application-&gt;handleRequest(Object(craft\web\Request))
              #9 /home/MyWebsite/www/web/index.php(21): yii\base\Application-&gt;run()
              #10 {main}
  </code></pre>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2018-04-12T05:19:21.743Z
Comments.Text: Can you find the 400 Bad Request entry in your `craft/storage/logs` folder and share the full stack trace leading up to it?
Comments.UserDisplayName: Brad Bell
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2018-04-13T13:15:05.630Z
Comments.Text: Hi Brad and thank you for your answer, I edited my post to add the logs !
Comments.UserDisplayName: Holino
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2018-04-14T23:40:09.737Z
Comments.Text: Have seen that happen when you try to install over http and the site is configured to use https (and visa-versa).  And if you're using Chrome it can be overly aggressive with it's caching if you make a switch (even in incognito mode). Have had to clear all of Chrome's caches before it would change sometimes.
Comments.UserDisplayName: Brad Bell
Tags: <craft3><installation>
Title: Craft 3 installation issue on account creation
ThreadText: # Craft 3 installation issue on account creation
  
  (Asked by: username_0 on 2018-04-10)
  
  I try to install Craft 3 but I encounter an issue at the very beginning.
  I uploaded the CMS via FTP and completed manually the .env file. When I try to run the installation, I get stuck at the account creation (the second step…) I want to create my account but the next button is doing nothing.
  I get an error 400 "Bad Request // Unable to verify your data submission." When I send the form to create the admin account (POST to <http://mywebsite.com/web/index.php?p=admin/actions/install/validate-account>).
  
  The server meet the requirements of Craft CMS (runned the server check and was ok). The DB connection is fine.
  
  I tried to delete and reupload all the CMS but nothing changed.
  
  Therefore, I'm unable to install Craft :| I saw some topics of the same issue but they're all unanswered.
  
  Thanks a lot !
  
  Here are the corresponding logs :
  
  ```
              2018-04-13 06:05:42 [2a02:a03f:3c1f:a00:6826:543f:275d:d8d5][-][-][error][yii\web\HttpException:400] yii\web\BadRequestHttpException: Unable to verify your data submission. in /home/MyWebsite/www/vendor/yiisoft/yii2/web/Controller.php:166
              Stack trace:
              #0 /home/MyWebsite/www/vendor/craftcms/cms/src/web/Controller.php(53): yii\web\Controller->beforeAction(Object(yii\base\InlineAction))
              #1 /home/MyWebsite/www/vendor/yiisoft/yii2/base/Controller.php(155): craft\web\Controller->beforeAction(Object(yii\base\InlineAction))
              #2 /home/MyWebsite/www/vendor/craftcms/cms/src/web/Controller.php(74): yii\base\Controller->runAction('validate-accoun...', Array)
              #3 /home/MyWebsite/www/vendor/yiisoft/yii2/base/Module.php(528): craft\web\Controller->runAction('validate-accoun...', Array)
              #4 /home/MyWebsite/www/vendor/craftcms/cms/src/web/Application.php(238): yii\base\Module->runAction('install/validat...', Array)
              #5 /home/MyWebsite/www/vendor/craftcms/cms/src/web/Application.php(446): craft\web\Application->runAction('install/validat...', Array)
              #6 /home/MyWebsite/www/vendor/craftcms/cms/src/web/Application.php(410): craft\web\Application->_processActionRequest(Object(craft\web\Request))
              #7 /home/MyWebsite/www/vendor/craftcms/cms/src/web/Application.php(147): craft\web\Application->_processInstallRequest(Object(craft\web\Request))
              #8 /home/MyWebsite/www/vendor/yiisoft/yii2/base/Application.php(386): craft\web\Application->handleRequest(Object(craft\web\Request))
              #9 /home/MyWebsite/www/web/index.php(21): yii\base\Application->run()
              #10 {main}
  
  ```
  
  **Tags:** craft3, installation
  
  > **Comments:**
  > **username_1**: Can you find the 400 Bad Request entry in your `craft/storage/logs` folder and share the full stack trace leading up to it?  
  > **username_0**: Hi username_1 and thank you for your answer, I edited my post to add the logs !  
  > **username_1**: Have seen that happen when you try to install over http and the site is configured to use https (and visa-versa).  And if you're using Chrome it can be overly aggressive with it's caching if you make a switch (even in incognito mode). Have had to clear all of Chrome's caches before it would change sometimes.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2018-04-16. Score: 0 | Accepted answer
  
  Hello and thanks username_1 !
  
  I was actually using Firefox. When I tried to install Craft 3 via Chrome (which has never gone to the website before) the issue was solved and I could access to the next page. Should be a cache issue !
  
  Thank you !
  
  Olivier.
  
  
  ---
  
  