Upgrade CMSMS version 1.12.2 to CMSMS 2.2.16 Fatal error: Uncaught

[Joesurf]

I have upgraded a fully operational site: https://upgrade.stanprowse.com CMSMS version 1.12.2 to CMSMS 2.2.16

I am experiencing a Blank Screen -- Fatal error: Uncaught --> Smarty: Plugin "tbGetTemplateVars" not callable <-- thrown in /home/prowse/upgrade.stanprowse/lib/smarty/sysplugins/smarty_internal_method_registerplugin.php on line 45

And the following Notice:

Notice: Undefined variable: config in /home/prowse/upgrade.stanprowse/modules/jqSlider/jqSlider.module.php on line 28

Deprecated: define(): Declaration of case-insensitive constants is deprecated in /home/prowse/upgrade.stanprowse/modules/SiteUtilities/SiteUtilities.module.php on line 1

Your Help Is Greatly appreciated.

[Joesurf]

More Information:

All installation steps 1 - 9 completed with no errors.
PHP version is 7.4

Server: CloudLinux server - Sprint Managed Flex Dedicated Server with Root. At A2 Hosting

WHM and C-Panel
https://www.ecom-works.com

[DIGI3]

You might just need to remove that plugin, perhaps it was a third-party one to replace the core get_template_vars. For the warning, remove or replace the SiteUtilities module, I'm not familiar with it but it looks like it hasn't had a release since 2011.