cannot log into admin back office panel

[gloria_ lozinsk]

As the website itself works as expected and the issue is connected with accessing Magento Admin dashboard, I would recommend you contact Magento Support
Please clarify with them which parameters should be fine-tuned in Plesk in case of a similar issue with 500 Internal Server Error, and provide me with their answer. I will assist you with applying the recommended steps

[Bhanu Periwal · Accepted solution]

Hi @gloria_ lozinsk 

you can run the following commands to start fixing the problem:

rm -rf var/page_cache var/cache var/composer_home var/generation var/di var/view_preprocessed
php bin/magento setup:upgrade
php bin/magento setup:static-content:deploy
php bin/magento indexer:reindex
php bin/magento indexer:clean

Give correct permissions to your directories:

All directories have 770 permissions.
770 permissions give full control (that is, read/write/execute) to the owner and to the group and no permissions to anyone else.
All files have 660 permissions.
660 permissions mean the owner and the group can read and write but other users have no permissions.

Try to run these commands in SSH and your permissions should be sorted:

cd <your Magento install dir> 

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

chown -R :<web server group> .

chmod u+x bin/magento

Set below values with php.ini file:

max_execution_time = 1800
max_input_time = 1800
memory_limit = 1024M

It may help you!
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