Exception: Warning: file_put_contents(/var/www/html/var/cache//mage-tags/mage---792_CONFIG): failed to open stream: Permission denied in /var/www/html/vendor/colinmollenhour/cache-backend-file/File.php on line 663 in /var/www/html/vendor/magento/framework/App/ErrorHandler.php:61
Stack trace:
#0 [internal function]: Magento\Framework\App\ErrorHandler->handler(2, 'file_put_conten...', '/var/www/html/v...', 663, Array)
#1 /var/www/html/vendor/colinmollenhour/cache-backend-file/File.php(663): file_put_contents('/var/www/html/v...', '792_GLOBAL_PRIM...', 10)
#2 /var/www/html/vendor/colinmollenhour/cache-backend-file/File.php(179): Cm_Cache_Backend_File->_updateIdsTags(Array, Array, 'merge')
#3 /var/www/html/vendor/magento/zendframework1/library/Zend/Cache/Core.php(390): Cm_Cache_Backend_File->save('a:3:{i:0;a:161:...', '792_GLOBAL_PRIM...', Array, NULL)
#4 /var/www/html/vendor/magento/framework/Cache/Core.php(74): Zend_Cache_Core->save('a:3:{i:0;a:161:...', '792_GLOBAL_PRIM...', Array, NULL, 8)
#5 /var/www/html/vendor/magento/framework/Cache/Frontend/Adapter/Zend.php(47): Magento\Framework\Cache\Core->save('a:3:{i:0;a:161:...', 'GLOBAL|PRIMARY|...', Array, NULL)
#6 /var/www/html/vendor/magento/framework/Cache/Frontend/Decorator/Bare.php(75): Magento\Framework\Cache\Frontend\Adapter\Zend->save('a:3:{i:0;a:161:...', 'global|primary|...', Array, NULL)
#7 /var/www/html/vendor/magento/framework/Cache/Frontend/Decorator/TagScope.php(51): Magento\Framework\Cache\Frontend\Decorator\Bare->save('a:3:{i:0;a:161:...', 'global|primary|...', Array, NULL)
#8 /var/www/html/vendor/magento/framework/Cache/Frontend/Decorator/Bare.php(75): Magento\Framework\Cache\Frontend\Decorator\TagScope->save('a:3:{i:0;a:161:...', 'global|primary|...', Array, NULL)
#9 /var/www/html/vendor/magento/framework/Cache/Frontend/Decorator/Bare.php(75): Magento\Framework\Cache\Frontend\Decorator\Bare->save('a:3:{i:0;a:161:...', 'global|primary|...', Array, NULL)
#10 /var/www/html/vendor/magento/framework/App/Cache/Type/AccessProxy.php(85): Magento\Framework\Cache\Frontend\Decorator\Bare->save('a:3:{i:0;a:161:...', 'global|primary|...', Array, NULL)
#11 /var/www/html/vendor/magento/framework/Cache/Frontend/Decorator/Bare.php(75): Magento\Framework\App\Cache\Type\AccessProxy->save('a:3:{i:0;a:161:...', 'global|primary|...', Array, NULL)
#12 /var/www/html/vendor/magento/framework/Cache/Frontend/Decorator/TagScope.php(51): Magento\Framework\Cache\Frontend\Decorator\Bare->save('a:3:{i:0;a:161:...', 'global|primary|...', Array, NULL)
#13 /var/www/html/vendor/magento/framework/Interception/PluginList/PluginList.php(324): Magento\Framework\Cache\Frontend\Decorator\TagScope->save('a:3:{i:0;a:161:...', 'global|primary|...')
#14 /var/www/html/vendor/magento/framework/Interception/PluginList/PluginList.php(266): Magento\Framework\Interception\PluginList\PluginList->_loadScopedData()
#15 /var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php(35): Magento\Framework\Interception\PluginList\PluginList->getNext('Magento\\Framewo...', 'catchException')
#16 /var/www/html/vendor/magento/framework/App/Bootstrap.php(261): Magento\Framework\App\Http\Interceptor->catchException(Object(Magento\Framework\App\Bootstrap), Object(Exception))
#17 /var/www/html/index.php(39): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http\Interceptor))
#18 {main}