Problem logging into Backend of Magento 2

Question

I have the following error what should I do?

Fatal error: Uncaught Zend_Cache_Exception: cache_dir "/home/tradesignletters/public_html/var/page_cache" is not writable in /home/tradesignletters/public_html/vendor/magento/zendframework1/library/Zend/Cache.php:209 Stack trace: #0 /home/tradesignletters/public_html/vendor/magento/zendframework1/library/Zend/Cache/Backend/File.php(180): Zend_Cache::throwException('cache_dir "/hom...') #1 /home/tradesignletters/public_html/vendor/colinmollenhour/cache-backend-file/File.php(87): Zend_Cache_Backend_File->setCacheDir('/home/tradesign...') #2 /home/tradesignletters/public_html/vendor/magento/zendframework1/library/Zend/Cache.php(153): Cm_Cache_Backend_File->__construct(Array) #3 /home/tradesignletters/public_html/vendor/magento/zendframework1/library/Zend/Cache.php(94): Zend_Cache::_makeBackend('Cm_Cache_Backen...', Array, true, true) #4 /home/tradesignletters/public_html/vendor/magento/framework/App/Cache/Frontend/Factory.php(154): Zend_Cache::factory('Magento\Framewo...', 'Cm_Cache_Backen...', Array, Array, true, true, tru in /home/tradesignletters/public_html/vendor/magento/zendframework1/library/Zend/Cache.php on line 209

Answer 1

This is permission issue. Just set below permission to folders

find . -type f -exec chmod 644 {} \; // 644 permission for files

find . -type d -exec chmod 755 {} \; // 755 permission for directory

find ./var -type d -exec chmod 777 {} \; // 777 permission for var folder

find ./pub/media -type d -exec chmod 777 {} \;

find ./pub/static -type d -exec chmod 777 {} \;

chmod 777 ./app/etc

chmod 644 ./app/etc/*.xml

Answer 2

Run this command below

php bin/magento cache:flush

php bin/magento cache:clean

chmod -R 777 var/ pub/

Answer 3

If it is Magento 2.2 please run this command below

php bin/magento cache:clean
php bin/magento cache:flush
sudo chmod -R 777 var/ pub/ generated/