Scale up as you grow — whether you're running one virtual machine or ten thousand.

From GPU-powered inference and Kubernetes to managed databases and storage, get everything you need to build, scale, and deploy intelligent applications.

This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.
Can you visit the Customizer and then post the last 10 lines of your error log:
tail -10 /var/log/nginx/error.log
EDIT: When you visit the Customizer in your browser, make sure there’s no errors relating to the Customizer displayed in your browser Console. If you use Chrome-browser: https://developer.chrome.com/devtools
error.log:
2017/07/27 16:41:52 [error] 17552#17552: *702 FastCGI sent in stderr: "PHP message: PHP Warning: copy(/var/www/html/wp-admin/includes/update-core.php): failed to open stream: Permission denied in /var/www/html/wp-admin/includes/class-wp-filesystem-direct.php on line 257" while reading upstream, client: 104.57.11.106, server: hollowseason.org, request: "POST /wp-admin/update-core.php?action=do-core-reinstall HTTP/2.0", upstream: "fastcgi://unix:/run/php/php7.0-fpm.sock:", host: "hollowseason.org", referrer: "https://hollowseason.org/wp-admin/update-core.php"
2017/07/27 16:54:08 [error] 1519#1519: *27 FastCGI sent in stderr: "PHP message: PHP Warning: copy(/var/www/html/readme.html): failed to open stream: Permission denied in /var/www/html/wp-admin/includes/class-wp-filesystem-direct.php on line 257
PHP message: PHP Warning: copy(/var/www/html/readme.html): failed to open stream: Permission denied in /var/www/html/wp-admin/includes/class-wp-filesystem-direct.php on line 257" while reading upstream, client: 104.57.11.106, server: hollowseason.org, request: "POST /wp-admin/update-core.php?action=do-core-reinstall HTTP/2.0", upstream: "fastcgi://unix:/run/php/php7.0-fpm.sock:", host: "hollowseason.org", referrer: "https://hollowseason.org/wp-admin/update-core.php"
After taking a look in the Firefox console I got the following errors:
(JS)
Load denied by X-Frame-Options: https://hollowseason.org/?customize_changeset_uuid=0b999999-e6c3-4b68-9bc1-8972c9badab8&customize_theme=twentyfifteen&customize_messenger_channel=preview-0 does not permit framing.
(CSS)
downloadable font: rejected by sanitizer (font-family: "dashicons" style:normal weight:normal stretch:normal src index:0) source: https://hollowseason.org/wp-includes/fonts/dashicons.eot