drupal - Drupal8 How to set a logo? -

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i new drupal. installed drupal 8 tried learn it. wanted change logo of site. using theme bartik. went apperance settings->logo image settings->upload logo image. selected image , tried save configuration error this.

fatal error: cannot instantiate interface drupal\core\cache\cachebackendinterface in /home/user/public_html/dp8/core/lib/drupal/component/dependencyinjection/container.php on line 265

why getting fatal error? did miss?

this may caused because of contributed module added. had changed logo on system , works fine, try clear caches , disable , dev version modules.

regards


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