Fatal Error – Can’t Access Plugins Page

Hi there – I’m trying to set up an SSL on my site, and when I installed Really Simple SSL, unfortunately, I just got blocked out of my plugins backend. I actually can’t even access the Plugins page to delete the Plugin and start over – I understand that I should need to activate the Let’s Encrypt Certificate before I activate the RSSSL plugin, but unfortunately I can’t do that now.

Here’s the text of the error I get:

Fatal error: Uncaught Error: Call to undefined function load_script_textdomain() in /home/clients/49ca684fab51227909cdea3cca24089e/rudolf-steiner-malschule.ch/wp-content/plugins/really-simple-ssl/settings/settings.php:81 Stack trace: #0 /home/clients/49ca684fab51227909cdea3cca24089e/rudolf-steiner-malschule.ch/wp-content/plugins/really-simple-ssl/modal/modal.php(13): rsssl_get_chunk_translations(‘modal/build’) #1 /home/clients/49ca684fab51227909cdea3cca24089e/rudolf-steiner-malschule.ch/wp-includes/class-wp-hook.php(286): rsssl_plugin_plugin_page_scripts(‘plugins.php’) #2 /home/clients/49ca684fab51227909cdea3cca24089e/rudolf-steiner-malschule.ch/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(false, Array) #3 /home/clients/49ca684fab51227909cdea3cca24089e/rudolf-steiner-malschule.ch/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #4 /home/clients/49ca684fab51227909cdea3cca24089e/rudolf-steiner-malschule.ch/wp-admin/admin-header.php(97): do_action(‘admin_enqueue_s…’, ‘plugins.php’) #5 /home/clients/49ca in?/home/clients/49ca684fab51227909cdea3cca24089e/rudolf-steiner-malschule.ch/wp-content/plugins/really-simple-ssl/settings/settings.php?on line?81

Do I need to figure out a way to manually disable the plugin from the Plugin Editor page? Any help would be appreciated!

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