title: There has been an error processing your request Magento
body: <p>I'm getting that message on the magento backedn and fronted </p>
  
  <p>There has been an error processing your request</p>
  
  <p>Exception printing is disabled by default for security reasons.</p>
  
  <p>Error log record number: 1054980566331</p>
  
  <p>that are the log errors: </p>
  
  <pre>
  [2017-01-31 14:56:06] main.CRITICAL: Exception: Warning: file_put_contents(/opt/bitnami/apps/magento/htdocs/var/cache//mage-tags/mage---c40_CONFIG): failed to open stream: Permission denied in /opt/bitnami/apps/magento/htdocs/vendor/colinmollenhour/cache-backend-file/File.php on line 663 in /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/App/ErrorHandler.php:61
  Stack trace:
  #0 [internal function]: Magento\Framework\App\ErrorHandler->handler(2, 'file_put_conten...', '/opt/bitnami/ap...', 663, Array)
  #1 /opt/bitnami/apps/magento/htdocs/vendor/colinmollenhour/cache-backend-file/File.php(663): file_put_contents('/opt/bitnami/ap...', 'c40_GLOBAL_PRIM...', 10)
  #2 /opt/bitnami/apps/magento/htdocs/vendor/colinmollenhour/cache-backend-file/File.php(179): Cm_Cache_Backend_File->_updateIdsTags(Array, Array, 'merge')
  #3 /opt/bitnami/apps/magento/htdocs/vendor/magento/zendframework1/library/Zend/Cache/Core.php(390): Cm_Cache_Backend_File->save('a:3:{i:0;a:101:...', 'c40_GLOBAL_PRIM...', Array, NULL)
  #4 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/Cache/Core.php(74): Zend_Cache_Core->save('a:3:{i:0;a:101:...', 'c40_GLOBAL_PRIM...', Array, NULL, 8)
  #5 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/Cache/Frontend/Adapter/Zend.php(47): Magento\Framework\Cache\Core->save('a:3:{i:0;a:101:...', 'GLOBAL|PRIMARY|...', Array, NULL)
  #6 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/Cache/Frontend/Decorator/Bare.php(75): Magento\Framework\Cache\Frontend\Adapter\Zend->save('a:3:{i:0;a:101:...', 'global|primary|...', Array, NULL)
  #7 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/Cache/Frontend/Decorator/TagScope.php(49): Magento\Framework\Cache\Frontend\Decorator\Bare->save('a:3:{i:0;a:101:...', 'global|primary|...', Array, NULL)
  #8 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/Cache/Frontend/Decorator/Bare.php(75): Magento\Framework\Cache\Frontend\Decorator\TagScope->save('a:3:{i:0;a:101:...', 'global|primary|...', Array, NULL)
  #9 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/Cache/Frontend/Decorator/Bare.php(75): Magento\Framework\Cache\Frontend\Decorator\Bare->save('a:3:{i:0;a:101:...', 'global|primary|...', Array, NULL)
  #10 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/App/Cache/Type/AccessProxy.php(85): Magento\Framework\Cache\Frontend\Decorator\Bare->save('a:3:{i:0;a:101:...', 'global|primary|...', Array, NULL)
  #11 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/Cache/Frontend/Decorator/Bare.php(75): Magento\Framework\App\Cache\Type\AccessProxy->save('a:3:{i:0;a:101:...', 'global|primary|...', Array, NULL)
  #12 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/Cache/Frontend/Decorator/TagScope.php(49): Magento\Framework\Cache\Frontend\Decorator\Bare->save('a:3:{i:0;a:101:...', 'global|primary|...', Array, NULL)
  #13 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/Interception/PluginList/PluginList.php(305): Magento\Framework\Cache\Frontend\Decorator\TagScope->save('a:3:{i:0;a:101:...', 'global|primary|...')
  #14 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/Interception/PluginList/PluginList.php(248): Magento\Framework\Interception\PluginList\PluginList->_loadScopedData()
  #15 /opt/bitnami/apps/magento/htdocs/var/generation/Magento/Framework/App/Response/Http/Interceptor.php(217): Magento\Framework\Interception\PluginList\PluginList->getNext('Magento\\Framewo...', 'setHttpResponse...')
  #16 /opt/bitnami/apps/magento/htdocs/pub/errors/processor.php(206): Magento\Framework\App\Response\Http\Interceptor->setHttpResponseCode(503)
  #17 /opt/bitnami/apps/magento/htdocs/pub/errors/report.php(14): Magento\Framework\Error\Processor->processReport()
  #18 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/App/Http.php(324): require('/opt/bitnami/ap...')
  #19 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/App/Http.php(160): Magento\Framework\App\Http->handleGenericReport(Object(Magento\Framework\App\Bootstrap), Object(Exception))
  #20 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/App/Bootstrap.php(263): Magento\Framework\App\Http->catchException(Object(Magento\Framework\App\Bootstrap), Object(Exception))
  #21 /opt/bitnami/apps/magento/htdocs/index.php(39): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http))
  #22 {main} [] []
  </pre>
  
  <p>what can i do about it?</p>