Got a Fatal error when the plugin is active.

Hello. I got this error when activating the plugin. How can I solve this problem. my PHP version is 7.4.

Fatal error: Uncaught Error: Call to undefined function iconv() in /home/wtdev/public_html/conservationdogs/wp-content/plugins/ooohboi-steroids-for-elementor/inc/RationalOptionPages.php:611 Stack trace: #0 /home/wtdev/public_html/conservationdogs/wp-content/plugins/ooohboi-steroids-for-elementor/inc/RationalOptionPages.php(794): RationalOptionPages->slugify(‘Steroids_for_El…’) #1 /home/wtdev/public_html/conservationdogs/wp-content/plugins/ooohboi-steroids-for-elementor/inc/RationalOptionPages.php(157): RationalOptionPages->validate_page(‘ob-settings-pag…’, Array) #2 /home/wtdev/public_html/conservationdogs/wp-content/plugins/ooohboi-steroids-for-elementor/inc/common-functions.php(135): RationalOptionPages->__construct(Array) #3 /home/wtdev/public_html/conservationdogs/wp-content/plugins/ooohboi-steroids-for-elementor/ooohboi-steroids.php(161): require(‘/home/wtdev/pub…’) #4 /home/wtdev/public_html/conservationdogs/wp-includes/class-wp-hook.php(287): OoohBoi_Steroids->init(”) #5 /home/wtdev/public_html/conservationd in /home/wtdev/public_html/conservationdogs/wp-content/plugins/ooohboi-steroids-for-elementor/inc/RationalOptionPages.php on line 611