Error message when updated to php 7.1

[Susie]

Susie

February 5, 2020 at 3:56 am

Hi – If I update the website to php v7.1, I get the following error message:

Fatal error: Uncaught Error: [] operator not supported for strings in /var/sites/r/ridgewaypress.co.uk/public_html/wp-content/plugins/revslider/includes/framework/base-admin.class.php:71 Stack trace: #0 /var/sites/r/ridgewaypress.co.uk/public_html/wp-content/plugins/revslider/admin/revslider-admin.class.php(572): RevSliderBaseAdmin::addMetaBox(‘Revolution Slid…’, ”, Array, NULL) #1 /var/sites/r/ridgewaypress.co.uk/public_html/wp-content/plugins/revslider/admin/revslider-admin.class.php(73): RevSliderAdmin->addSliderMetaBox() #2 /var/sites/r/ridgewaypress.co.uk/public_html/wp-content/plugins/revslider/admin/revslider-admin.class.php(44): RevSliderAdmin->init() #3 /var/sites/r/ridgewaypress.co.uk/public_html/wp-content/plugins/revslider/revslider.php(164): RevSliderAdmin->__construct(‘/var/sites/r/ri…’) #4 /var/sites/r/ridgewaypress.co.uk/public_html/wp-settings.php(360): include_once(‘/var/sites/r/ri…’) #5 /var/sites/r/ridgewaypress.co.uk/public_html/wp-config.php(81): require_once(‘/var/sites/r/ri…’) #6 /var/site in /var/sites/r/ridgewaypress.co.uk/public_html/wp-content/plugins/revslider/includes/framework/base-admin.class.php on line 71

We do use a slider on the home page, but it is a Kadence slider, not Slider Revolution (which is installed as part of the theme).
I have no idea what this means, but it does mean that the website is currently at an insecure level of php.

Could you let me know what we need to do please?

Thank you
Susie