Can no Longer Access Dashboard after Activating Plugin

We recently updated the theme to Kadence/Virtue (free version) while also updating the php version to 8.3. This morning, we received a message that the ‘free version of Virtue/Kadence requires a plugin’. The plugin for ‘One Click Demo for Kadence Importer’ was in the Plugins list with the option to ‘Activate’. We activated it and immediately received several warnings:

Warning: The magic method OCDI\OneClickDemoImport::__wakeup() must have public visibility in /home/earthwalkers/www/www/wp-content/plugins/kadence-importer/inc/OneClickDemoImport.php on line 128

Warning: Cannot modify header information – headers already sent by (output started at /home/earthwalkers/www/www/wp-content/plugins/kadence-importer/inc/OneClickDemoImport.php:128) in /home/earthwalkers/www/www/wp-includes/pluggable.php on line 1435

Warning: Cannot modify header information – headers already sent by (output started at /home/earthwalkers/www/www/wp-content/plugins/kadence-importer/inc/OneClickDemoImport.php:128) in?/home/earthwalkers/www/www/wp-includes/pluggable.php?on line?1438

Since this morning, we have been unable to access the dashboard. Also, the url has an extension on it: https://www.earthwalkers.me/165-2/

How can we regain access to the dashboard so we can deactivate the plugin? The website appears to mostly be working, though the first warning is displayed at the top (Warning: The magic method OCDI\OneClickDemoImport::__wakeup() must have public visibility in?/home/earthwalkers/www/www/wp-content/plugins/kadence-importer/inc/OneClickDemoImport.php?on line?128) .

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