There has been an error processing your request

[karl_lakolak]

Hi

can you help me

same trouble, can't access my site:

There has been an error processing your request

SQLSTATE[28000] [1045] Access denied for user

[kong_khieu]

I ran into the same situation. What I did to fix the problem is to re-index the magento folder.

php bin/magento indexer:reindex

[technoswift]

manually removing all the files in "cache" and "page cache" solved the problem for me.

[giovanny_jarami]

Try flushing the cache and that's it

[fco edson_aguia]

1. Find out what the exact problems, for this you need to enable printing errors.
    1.1 use this command at the root of the project -> find . -type f -name local.xml.sample
    1.2  you will find a file named local.xml.sample. Rename this file to local.xml
2. And clear cache using the command at the root of the project -> rm -rf var/cache/*

Now it will be simpler to resolve with the error displaying on the page.