Critical Error Caused by Plugin

This WordPress site has been displaying a critical error for a few days while having the plugin installed for many years. The contents of the site admin email are below.

The recovery link does not work; it simply loops and sends another error email. The website frontend is mostly working, but the login page and all backend functionality results in a critical error.

I have attempted to disable the plugin by renaming its folder within the plugins folder. When I do this, the site crashes completely and the frontend stops working. I am unable to update plugins or access the WordPress admin dashboard.

Suggestions are appreciated.

When seeking help with this issue, you may be asked for some of the following information:
WordPress version 6.6.2
Active theme: Groppe (version 2.9)
Current plugin: Give – Donation Plugin (version 3.14.1)
PHP version 7.4.33



Error Details
=============
An error of type E_ERROR was caused in line 427 of the file /home/refireculinary/public_html/wp-content/plugins/give/vendor/symfony/polyfill-mbstring/Mbstring.php. Error message: Uncaught Error: Call to undefined function Symfony\Polyfill\Mbstring\iconv() in /home/refireculinary/public_html/wp-content/plugins/give/vendor/symfony/polyfill-mbstring/Mbstring.php:427
Stack trace:
#0 /home/refireculinary/public_html/wp-content/plugins/give/vendor/symfony/polyfill-mbstring/bootstrap.php(49): Symfony\Polyfill\Mbstring\Mbstring::mb_check_encoding(‘INSERT INTO wp...', 'ASCII')<br>#1 /home/refireculinary/public_html/wp-includes/class-wpdb.php(3456): mb_check_encoding('INSERT INTOwp…’, ‘ASCII’)
#2 /home/refireculinary/public_html/wp-includes/class-wpdb.php(2234): wpdb->check_ascii(‘INSERT INTO wp...')<br>#3 /home/refireculinary/public_html/wp-includes/option.php(1120): wpdb->query('INSERT INTOwp…’)
#4 /home/refireculinary/public_html/wp-includes/option.php(1522): add_option(‘_transient_wcpa…’, Array, ”, ‘off’)
#5 /home/refireculinary/public_html/wp-content/plugins/woocommerce-payments/includes/class-wc-payments-localization-service.php(143): set_transient(‘wcpay_locale_in…’, Array, 8640

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