Gutenberg Editor fails to load, leaving blank page where it should be (solved by updating file permissions and restarting the server)

[primedcore]

Describe the bug
Possibly a duplicate of #8455, however the same bug is also induced by changing the default Permalinks format to "Day and Title".
To Reproduce
Steps to reproduce the behavior:

1. Install Gutenberg 3.4.0 on WordPress 4.9.8 with PHP 7.2.8 and latest versions of other software required.
2. Go to WordPress Dashboard
3. Hover over Settings in the left hand side menu
4. Click on Permalinks in the expanded ribbon
5. Change the default of the Permalinks format from "Plain" to "Day and Name"
6. Go to Posts or Pages
7. Click on the arrow on the right of the new Add New button
8. Select Gutenberg Editor
9. Bug displays (👎)

Expected behavior
The Gutenberg editor loads properly and waits for the user to edit a new page.

Actual behavior
The Gutenberg editor fails to load, and the content page is left blank, with no "Publish" button or sidebar, except for the WordPress menu on the left hand side and the top "admin" bar of WordPress.

Desktop:

• OS: Windows 10 Home
• Browser: Opera 54, Chrome 67 (yes, out of date)
• Gutenberg Version: 3.4.0

Additional context

• again. Gutenberg version 3.4.0, wordpress 4.9.8, other listed above

[abwdvm]

Maybe upgrade your WordPress 3.9.8 to Wordpress 4.9.8

[primedcore]

Sorry, I meant 4.9.8. I have the latest version.

[youknowriad]

Could this fix it #8578?

[primedcore]

Nope, found the solution. The permalinks were improperly set up. I needed to add permissions to .htaccess and modify httpd.conf. That solved it and now it's working as expected. Thank you for your help anyway.

I'm providing some details for future reference: I needed to enable the rewrite module for Apache from etc/httpd/httpd.conf. Then, I did chmod 666 ".htaccess" to grant permissions for writing. I restarted the httpd service for the changes to take effect with systemctl restart httpd (RHEL 7) and flushed the permissions.