PHP upgrade throws Slider Revolution error

[Susie]

Susie

June 28, 2020 at 2:55 am

Hi I thought I had submitted this problem yesterday but I can’t find it so assume that I didn’t submit it properly or something. Anyway, as a result, I don’t have access to the exact error message but another user had a similar problem a while ago and will include what their message was – the log is *Login to see link

wiltonwindmill.co.uk is on PHP version 7.0 and for security and performance, it needs to be updated to 7.3 (according to WordPress). I updated the PHP version to 7.3 and got an error message regarding Slider Revolution. I found the same problem on the support forums here and the solution seemed to be to use 7.1. So I changed to 7.1 and that didn’t work either – I still got an error message but it was different and in fact couldn’t access the admin screens. I received this email from WordPress:
Hi!

Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

In this case, WordPress caught an error with one of your plugins, Slider Revolution.

First, visit your website (*Login to see link and check for any visible issues. Next, visit the page where the error was caught (*Login to see link and check for any visible issues.

Please contact your host for assistance with investigating this issue further.

If your site appears broken and you can’t access your dashboard normally, WordPress now has a special “recovery mode”. This lets you safely login to your dashboard and investigate further.

*Login to see link

To keep your site safe, this link will expire in 1 day. Don’t worry about that, though: a new link will be emailed to you if the error occurs again after it expires.

When seeking help with this issue, you may be asked for some of the following information:
WordPress version 5.4.2
Current theme: Virtue – Premium (version 4.9.24)
Current plugin: Slider Revolution (version 5.1.6)
PHP version 7.3.3

Error Details
=============
An error of type E_ERROR was caused in line 71 of the file /var/sites/w/wiltonwindmill.co.uk/public_html/wp-content/plugins/revslider/includes/framework/base-admin.class.php. Error message: Uncaught Error: [] operator not supported for strings in /var/sites/w/wiltonwindmill.co.uk/public_html/wp-content/plugins/revslider/includes/framework/base-admin.class.php:71
Stack trace:
#0 /var/sites/w/wiltonwindmill.co.uk/public_html/wp-content/plugins/revslider/admin/revslider-admin.class.php(465): RevSliderBaseAdmin::addMetaBox(‘Revolution Slid…’, ”, Array, NULL)
#1 /var/sites/w/wiltonwindmill.co.uk/public_html/wp-content/plugins/revslider/admin/revslider-admin.class.php(72): RevSliderAdmin->addSliderMetaBox()
#2 /var/sites/w/wiltonwindmill.co.uk/public_html/wp-content/plugins/revslider/admin/revslider-admin.class.php(44): RevSliderAdmin->init()
#3 /var/sites/w/wiltonwindmill.co.uk/public_html/wp-content/plugins/revslider/revslider.php(165): RevSliderAdmin->__construct(‘/var/sites/w/wi…’)
#4 /var/sites/w/wiltonwindmill.co.uk/public_html/wp-settings.php(371): include_once(‘/var/sites/w/wi…’)
#5 /var/sites/w/wiltonwindmill.co.uk/public_html/wp-config.php(98): require_once(‘/var/sites/w/wi…’)
#6 /v

I have since changed PHP back to version 7.0 but obviously I need to find a resolution to the Revolution Slider problem in order to move forward.

Your help is most appreciated.

best wishes
Susie