PHP Warning in error log

Just updated and got the same error:

2018/02/21 08:21:42 [error] 1258#0: *31345 FastCGI sent in stderr: "PHP message: PHP Warning:  Declaration of AS3CF_Stream_Wrapper::register(Aws\S3\S3Client $client, $protocol = 's3') should be compatible with Aws\S3\StreamWrapper::register(Aws\S3\S3ClientInterface $client, $protocol = 's3', ?Aws\CacheInterface $cache = NULL) in /var/www/analisilaica.it/htdocs/wp-content/plugins/amazon-s3-and-cloudfront/classes/as3cf-stream-wrapper.php on line 3
PHP message: PHP Stack trace:
PHP message: PHP   1. {main}() /var/www/analisilaica.it/htdocs/index.php:0
PHP message: PHP   2. require() /var/www/analisilaica.it/htdocs/index.php:17
PHP message: PHP   3. require_once() /var/www/analisilaica.it/htdocs/wp-blog-header.php:13
PHP message: PHP   4. require_once() /var/www/analisilaica.it/htdocs/wp-load.php:37
PHP message: PHP   5. require_once() /var/www/analisilaica.it/htdocs/wp-config.php:106
PHP message: PHP   6. do_action() /var/www/analisilaica.it/htdocs/wp-settings.php:450
PHP message: PHP   7. WP_Hook->do_action() /var/www/analisilaica.it/htdocs/wp-includes/plugin.php:453
PHP message: PHP   8. WP_Hook->apply_filters() /var/www/analisilaica.it/htdocs/wp-includes/class-wp-hook.php:310
PHP message: PHP   9. amazon_web_services_init() /var/www/analisilaica.it/htdocs/wp-includes/class-wp-hook.php:286
PHP message: PHP  10. Amazon_Web_Services->__construct() /var/www/analisilaica.it/htdocs/wp-content/plugins/amazon-web-services/amazon-web-services.php:53
PHP message: PHP  11. do_action() /var/www/analisilaica.it/htdocs/wp-content/plugins/amazon-web-services/classes/amazon-web-services.php:37
PHP message: PHP  12. WP_Hook->do_action() /var/www/analisilaica.it/htdocs/wp-includes/plugin.php:453
PHP message: PHP  13. WP_Hook->apply_filters() /var/www/analisilaica.it/htdocs/wp-includes/class-wp-hook.php:310
PHP message: PHP  14. as3cf_init() /var/www/analisilaica.it/htdocs/wp-includes/class-wp-hook.php:286
PHP message: PHP  15. require_once() /var/www/analisilaica.it/htdocs/wp-content/plugins/amazon-s3-and-cloudfront/wordpress-s3.

Here is the list of my active plugins:

Accelerated Mobile Pages (v0.9.82.1) by Ahmed Kaludi, Mohammed Kaludi
Akismet Anti-Spam (v4.0.3) by Automattic
Amazon Polly (v1.0.2) by AWS Labs, WP Engine
Amazon Web Services (v1.0.5) by Delicious Brains
Autoptimize (v2.3.2) by Frank Goossens (futtta)
Better Related Content (v0.4.3.4) by Nicolas Kuttler
Debug This (v0.5.2) by Brian Fegter, Chris Dillon
Disqus for WordPress (v3.0.12) by Disqus
Easy Google Analytics for WordPress (v1.6.0) by Shaon
Easy rel=author Plugin (v0.71b) by Kevin Meyer
FeedBurner FeedSmith Extend (v1.0.0) by Jiayu (James) Ji
Gmail SMTP (v1.1.7) by naa986
Italy Cookie Choices (for EU Cookie Law) (v2.5.1) by Enea Overclokk, Andrea Pernici, Andrea Cardinale
Jetpack by WordPress.com (v5.8) by Automattic
Nginx Helper (v1.9.10) by rtCamp
P3 (Plugin Performance Profiler) (v1.5.3.9) by GoDaddy.com
PHP Compatibility Checker (v1.4.5) by WP Engine
Page Speed Optimization (v2.9.10) by o10n-x
Redirection (v3.2.1) by John Godley
SSL Insecure Content Fixer (v2.5.0) by WebAware
Security Headers (v0.9) by Simon Waters (Surevine Ltd)
Simple Open Graph (v2.4) by Kevin Bowers
Simple Sitemap (v2.4) by David Gwyer
UpdraftPlus - Backup/Restore (v1.14.4) by UpdraftPlus.Com, DavidAnderson
WP Offload S3 Lite (v1.3.1) by Delicious Brains
WP to Twitter (v3.3.2) by Joseph Dolson
WP-PageNavi (v2.92) by Lester «GaMerZ» Chan
WP-Piwik (v1.0.19) by André Bräkling
Yoast SEO (v6.3.1) by Team Yoast
iThemes Security (v6.9.0) by iThemes
miniOrange 2 Factor Authentication (v4.5.7) by miniOrange