Plugin produces Error 503

Hi,
i installed fallback German to some pages, but today i get an Error 503 after installing and activating “Deutsch” in configuration.

Log says: “Connection reset by peer: AH01075”
Any hints for this issue?

Here my Enviroment:

### WordPress Environment ###

WP Version: 5.3.2
WP Multisite: –
PHP Memory Limit: 256 MB
WP Debug Mode: –
Language: de_DE_formal

### Server Environment ###

Server Info: Apache
PHP Version: 7.1.33. WordPress recommendation: 7.3 or above. See WordPress Requirements for details.
PHP Post Max Size: 8 MB
PHP Time Limit: 300
PHP Max Input Vars: 5000
SUHOSIN Installed: –
ZipArchive: ✔
MySQL Version: 5.5.64
Max Upload Size: 8 MB
DOMDocument: ✔
WP Remote Get: ✔
WP Remote Post: ✔
GD Library: bundled (2.1.0 compatible)

### Active Plugins (31) ###

LayerSlider WP: von Kreatura Media
A-Z Auflistung: von Daniel Llewellyn
Admin Menu Editor Pro: von Janis Elsts
Ajax Search Pro: von Ernest Marcinko
Akismet Anti-Spam: von Automattic
Contact Form 7 Conditional Fields: von Jules Colle
Contact Form 7 Datepicker: von Aurel Canciu
Honeypot for Contact Form 7: von Nocean
Contact Form 7: von Takayuki Miyoshi
Cookie Notice: von dFactory
Fix Image Rotation: von Gagan Deep Singh
Fusion Builder: von ThemeFusion
Fusion Slider: von Theme Einstellungen
Fusion White Label Branding: von ThemeFusion
Google Analytics Germanized: von Pascal Bajorat
Google Analytics Dashboard for WP (GADWP): von ExactMetrics
Loco Translate: von Tim Whitlock
MailPoet 3 Premium (New): von MailPoet
MailPoet 3 (New): von MailPoet
Google Analytics Opt-Out (DSGVO / GDPR): von Schweizer Solutions GmbH
PDF Embedder: von Lever Technology LLC
Popup Maker: von Popup Maker
Post Types Order: von Nsp Code
QR Redirector: von Nikki Blight
The Events Calendar: von Modern Tribe
Inc.

Yoast SEO: von Team Yoast
WP Google Maps: von WP Google Maps
WP Responsive Recent Post Slider Pro: von WP Online Support
WP Tiles: von Mike Martel
WordPress Toolbar Editor: von Janis Elsts
WPS Hide Login: von WPServeur
NicolasKulka
tabrisrp

Thx

Pete