Drupal 8.x

I installed Drupal 8, entered in the log in the admin panel, and there is the following warning:

Warning: Cannot modify header information - headers already sent by (output started at .../www/vendor/symfony/http-foundation/Response.php:1151) in Drupal\Core\Session\SessionManager->destroy() (line 267 of .../www/core/lib/Drupal/Core/Session/SessionManager.php).

On my hosting no PHP OPcode. Hoster promised later to install. Drupal is installed because it is not a critical requirement.

Could this module make this error? If not, what I do next?

Hi all.

I have a project where users would be assigned a node by a vote or other decision process so that the user would then have a contract to complete. Then for the completion another user would have to testify or report that the contract or service is accomplished and rate the person. My project is to help people take roles to feel however they would like to feel.

I would like to develop it with drupal 8.

What plugins and procedure should I take ?

I have thought of experimenting with views, actions, triggers, rules.

So far I have found this :

Hi,

I created a custom Drupal 8 site (my own theme), and built it locally and then deployed to my server. It's all up and all the pages load fine, but user/login is giving me a page not found.

The site is here: www.wheelercreek.com

It's very strange. user/register shows up..? all the links are working so it's not a cleanURL problem. There's not a conflicting url alias either. Any ideas? I can't login!!

Could any of you Drupal aficionados advise why v.8.x fails to install on MAMP Pro v.3.4 (the latest version of MAMP)?

Apache version: Apache

Due to the settings for ServerTokens in httpd.conf, it is impossible to accurately determine the version of Apache running on this server. The reported value is Apache, to run Drupal without mod_rewrite, a minimum version of 2.2.16 is needed.

PHP Opcode caching: Not enabled
PHP OPcode caching can improve your site's performance considerably. It is highly recommended to have OPcache installed on your server.

So work was slow today so I went and in about a half day migrated my marketing page:

http://www.drupalbydean.com/

to a D8 version

http://d8dpd.deanmyerson.org/

What I usually do then is to move the new one to the main domain:

mv drupalbydean.com old_drupalbydean.com
mv d8dpb drupalbydean.com

I have done a fresh install of the production version of Drupal 8. I have done it several times. Whenever my new site is presented, there is no CSS. I logged in as admin, no CSS. There were a few URLs in the admin submenus that when clicked did cause the linked page to load CSS. I did not see anything obvious in the configuration.