Gateway Timeout при попытке оплаты через PayPal или Stripe в Woocommerce. Как устранить проблему?

### WordPress Environment ###

Home URL: https://www.qhhtofficial.com
Site URL: https://www.qhhtofficial.com
WC Version: 3.2.6
Log Directory Writable: ✔
WP Version: 4.9.1
WP Multisite: –
WP Memory Limit: 768 MB
WP Debug Mode: ✔
WP Cron: ✔
Language: en_US

### Server Environment ###

Server Info: Apache
PHP Version: 7.0.26
PHP Post Max Size: 256 MB
PHP Time Limit: 500
PHP Max Input Vars: 1000
cURL Version: 7.57.0
OpenSSL/1.0.2m

SUHOSIN Installed: –
Max Upload Size: 32 MB
Default Timezone is UTC: ✔
fsockopen/cURL: ✔
SoapClient: ✔
DOMDocument: ✔
GZip: ✔
Multibyte String: ✔
Remote Post: ✔
Remote Get: ✔

Неужели никто не сталкивался с подобной проблемой?