Entire website crashed after plug-in update

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I had a plug-in update today, and four minutes later, my whole site was unavailable. Absolutely none of the pages load, and I’m left with this message:

Warning: require_once(/home/customer/www/dialoguematters-training.co.uk/public_html/wp-content/plugins/iks-menu/freemius/includes/managers/class-fs-clone-manager.php): failed to open stream: No such file or directory in /home/customer/www/dialoguematters-training.co.uk/public_html/wp-content/plugins/iks-menu/freemius/require.php on line 24

Fatal error: require_once(): Failed opening required ‘/home/customer/www/dialoguematters-training.co.uk/public_html/wp-content/plugins/iks-menu/freemius/includes/managers/class-fs-clone-manager.php’ (include_path=’.:/usr/local/php74/pear’) in /home/customer/www/dialoguematters-training.co.uk/public_html/wp-content/plugins/iks-menu/freemius/require.php on line 24

How can I go about getting it to work again? I’m relatively new to building WordPress websites and maintenance, so I’m not sure what the best course of action is to fix it. Presumably, I need to roll back the update somehow?

The plug-in in question: Iks Menu (from version 1.9.8 to 1.10.0) :

WordPress version 6.2
Active theme: Hello Elementor (version 2.6.1)
Current plugin: Iks Menu (version 1.10.0)
PHP version 7.4.33

The page I need help with: [log in to see the link]

 

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