Magento 2 404 Error Page Not Found in Admin

After installing Magento 2 Extensions, you may get the Magento 2 404 Error Page Not Found error in admin’s pages. No worries, that is because of the permission in your current session. Let’s follow this guide, we will show you 4 reasons why it occurs, either due to Magento 2 installation, extension upgrade, the 403 Forbidden error, or messy page; as well as solutions on how to resolve 404 Error Page Not Found step by step.

Related Topics:

• Configure Full Page Cache
• 10 Cache Types: How to Manage Cache
• Service Temporarily Unavailable
• Exception printing is disabled by default for security reasons
• You Don’t Have Permission To Access / On This Server

4 problems why Magento 2 404 Error Page Not Found in Admin

Here are 4 reasons why you get a 404 Error Page Not Found in the backend and guidance on how to solve them. Please, follow the steps to learn how to deal with the issue of each case.

• Problem 1: After installing/upgrading
• Problem 2: Fresh Install On Ubuntu/Centos/Debian
• Problem 3: Page 403 Forbidden errors
• Problem 4: Messy page, no style

Problem 1: After installing/upgrading

You may get the error in cases of:

• After installing a new extension
• After upgrading extensions
• After applying patches of Magento core or extensions.

Solution:

Flush Magento Cache with command line:

php bin/magento cache:clean
rm -rf var/cache/*
rm -rf var/generation/*

Read How to flush Magento 2 cache for more details.

• Flush cache in Admin: Admin > Systems > Cache Management
• Log out then login again

Case: 404 Error Page not found error on extension admin route update Installing SUPEE - 6788

Try to contact the extension provider for more details.

Problem 2: Fresh Install On Ubuntu/Centos/Debian

Description: After installation on Ubuntu/Centos/Debian, this error may be shown like this:

Why?

It’s because your server does not enable rewrite mode.

Solution

1. Enable Rewrite mode

sudo a2enmod rewrite

1. Configure apache

For Ubuntu / Debian edit the file /etc/apache2/apache2.conf. To edit this file, you can run command

sudo vi /etc/apache2/apache2.conf 

Modify from:

<Directory /var/www/>
     Options Indexes FollowSymLinks
     AllowOverride None
     Require all granted
</Directory>

to

<Directory /var/www/>
    Options Indexes FollowSymLinks
    AllowOverride All
    Require all granted
</Directory>

Then restart apache

sudo service apache2 restart

or

sudo /etc/init.d/apache2 restart

Problem 3: Page 403 Forbidden errors

If you are experencing with 403 Forbidden errors while accessing to Magento store, you should update Apache configuration to allow visitors access to your site.

Solution

• Open apache2.conf file
• For Ubuntu, the file /etc/apache2/apache2.conf. To edit this file run command

sudo vi /etc/apache2/apache2.conf 

Update like this:

<Directory /var/www/>
	Options Indexes FollowSymLinks MultiViews
	AllowOverride All
	Order allow,deny
	Allow from all
</Directory>

Problem 4: Messy page, no style

As shown in the below image, a messy frontend may occur, leading to the 404 error in the backend.

Why?

There are 2 cases:

• You server does not enable rewrite mode, try this solution
• Deploy static content: follow the below solution.

Solution

It is because the static content is not generated to the pub/ folder. Let’s run this command to deploy it. Please try to run the following command:

php bin/magento setup:static-content:deploy

The bottom line

These are 4 main causes and solutions for the 404 error Page Not Found in Magento 2. It is an annoying but quite common error, so as long as you are well aware of the reason, you can quickly fix the problem. If you find any other problem or want to discuss further, feel free to write in the comment box.

What about Magento 2 backend not working error?