Getting below fatal error when I try to install the Administration menu module in D8.

Fatal error: Cannot instantiate interface Drupal\Core\Cache\CacheBackendInterface.

Comments

Yash Khandelwal created an issue. See original summary.

Znak’s picture

Znak CreditAttribution: Znak commented

This module have problem with this error and variables, because if I uninstall this module I have problem with variable_get() function.

deepuchowdary07’s picture

deepuchowdary07 CreditAttribution: deepuchowdary07 commented

hi
just now I installed drupal8 but below error is displaying.

Fatal error: Cannot instantiate interface Drupal\Core\Cache\CacheBackendInterface in C:\wamp\www\drupal8\core\lib\Drupal\Component\DependencyInjection\Container.php on line 268

May i know the solution for this?

frederico’s picture

frederico CreditAttribution: frederico commented

I had to delete the module via FTP and then flush the cache using a Drush command. It then removed the dreaded "White Screen of Death" issue. But reinstalling it breaks it again. I'm still looking for a solution but hopefully this will help someone at least get their website back up and running quickly.

frederico’s picture

frederico CreditAttribution: frederico commented

Actually, I found a MUCH better answer to your question than mine. Go to https://www.drupal.org/node/2750847#comment-11307391. Taekyon gives a great step-by-step recovery procedure for your problem.

helmo’s picture

helmo CreditAttribution: helmo at Initfour websolutions for Aegir Cooperative commented
Status: Active » Closed (duplicate)
Related issues: +#2563867: PHP Fatal errors: Cannot instantiate interface Drupal\Core\Cache\CacheBackendInterface and others

This seems like a duplicate of #2563867: PHP Fatal errors: Cannot instantiate interface Drupal\Core\Cache\CacheBackendInterface and others