balsa0

Same here

Opening media library >>>
POST wp-admin/admin-ajax.php
action: query-attachments
post_id: 0
query[orderby]: date
query[order]: DESC
query[posts_per_page]: 40
query[paged]: 1
>>>
500 Internal Server Error
No response body

Wordpress: 4.9.8 and 5.0.0 (upgrade did not help)
Smush: 2.9.1

Reproducing steps:
Not sure why, but if more than 19 plugins are enabled along with smush (whatever plugins they are), smush breaks the media library. It works fine with any number of plugins if I disable just smush.

List of plugins I use:

Akismet Anti-Spam
4.1 version | Author: Automattic

Contact Widgets
1.6.0 version | Author: GoDaddy

Enhanced E-commerce for Woocommerce store
2.1.4 version | Author: Tatvic

FB Messenger Live Chat
1.4.3 version | Author: Zotabox

GDPR Cookie Compliance
1.2.2 version | Author: Moove Agency

Health Check & Troubleshooting kiválasztása
1.2.2 version | Author: The ww.wp.xz.cn community

iThemes Security
7.2.0 version | Author: iThemes | Get Support

Jetpack a WordPress.com-tól
6.8.1 version | Author: Automattic

Loginizer
1.4.0 version | Author: Raj Kothari

Regenerate Thumbnails
3.0.2 version | Author: Alex Mills (Viper007Bond)

Schema
1.7.2 version | Author: Hesham

Smush
2.9.1 version | Author: WPMU DEV

SSL Insecure Content Fixer
2.7.2 version | Author: WebAware | SSL Tests | Instructions | Get help | Rating | Translate | Donate

Woo Store Vacation
1.2.4 version | Author: Mahdi Yazdani

WooCommerce
3.5.2 version | Author: Automattic | Dokumentáció | API dokumentáció | Prémium Támogatás

Woocommerce Facebook Comment & Share
1.5.6 version | Author: Shameem Reza

WooCommerce Facebook Like Share Button
2.2.4 version | Author: Terry Tsang

WooCommerce Product Image Gallery Options
1.1.0 version | Author: Create and Code

WP Facebook Login for WordPress
1.2.3.3 version | Author: Damian Logghe

WP GDPR Compliance
1.4.5 version | Author: Van Ons

WPSSO Core [Main Plugin]
4.17.3.1 version | Author: JS Morisset

WPSSO Schema JSON-LD Markup
1.36.1 version | Author: JS Morisset

Yoast SEO
9.2.1 version | Author: Team Yoast