Error after updating Polylang pro

Hi, after updating Polylang pro to the latest version, I got this error message: 

Deprecated: Class property PLL_Language::$home_url is deprecated, use PLL_Language::get_home_url() instead. Error handler in /var/www/vhosts/duracryl.nl/httpdocs/wp-content/plugins/polylang-pro/vendor/wpsyntex/polylang/include/language-deprecated.php on line 253 

This results in Elementor not saving changes any more.?

After reaching out to polylang we found out that ‘Connect Polylang to Elementor’ causes the problem.

Polylang says this about how to fix the problem:
This message is displayed by Polylang to advertise the 3rd party plugin developer we changed some rules and they need to adapt/maintain their code.
This is “only” a notice, so it doesn’t break anything in your website but you should search which plugin is using our function and ask them to correct and publsh a new verison of their plugin.

Could somebody help?

Thanks a lot.

Jacob