PHP 8.x Support

I moved hosting and am now on PHP 8 and am getting the following errors:

2022/09/30 15:41:59 [error] 1192#1192: *660 FastCGI sent in stderr: "PHP message: PHP Warning:  Undefined array key "text_font" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 71PHP message: PHP Warning:  Undefined array key "text_font_size" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 76" while reading response header from upstream, client: x.x.x.x, server: example.com, request: "GET /contact/ HTTP/2.0", upstream: "fastcgi://unix:/run/php/php8.0-fpm.sock:", host: "www.example.com", referrer: "https://www.example.com/testimonials/"
2022/09/30 15:42:05 [error] 1192#1192: *660 FastCGI sent in stderr: "PHP message: PHP Warning:  Undefined array key "text_font" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 71PHP message: PHP Warning:  Undefined array key "text_font_size" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 76" while reading response header from upstream, client: x.x.x.x, server: example.com, request: "GET /event-registration/ HTTP/2.0", upstream: "fastcgi://unix:/run/php/php8.0-fpm.sock:", host: "www.example.com", referrer: "https://www.example.com/free-speaking-leadership-tips/"
2022/09/30 15:45:53 [error] 1191#1191: *780 FastCGI sent in stderr: "PHP message: PHP Warning:  Undefined array key "text_font" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 71PHP message: PHP Warning:  Undefined array key "text_font_size" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 76PHP message: PHP Warning:  Undefined array key "text_font" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 114PHP message: PHP Warning:  Undefined array key "text_font_size" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 115PHP message: PHP Warning:  Undefined array key "text_font_weight" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 116PHP message: PHP Warning:  Undefined variable $background_title in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 154PHP message: PHP Warning:  Undefined variable $background_text in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 155PHP message: PHP Warning:  Undefined array key "text_font" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 114PHP message: PHP Warning:  Undefined array key "text_font_size" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 115PHP message: PHP Warning:  Undefined array key "text_font_weight" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 116PHP message: PHP Warning:  Undefined variable $background_title in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 154PHP message: PHP Warning:  Undefined variable $background_text in /var/www/html/xxx/wp-co
2022/09/30 15:45:53 [error] 1191#1191: *780 FastCGI sent in stderr: "urve-toggle-showhide.php on line 115PHP message: PHP Warning:  Undefined array key "text_font_weight" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 116PHP message: PHP Warning:  Undefined variable $background_title in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 154PHP message: PHP Warning:  Undefined variable $background_text in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 155PHP message: PHP Warning:  Undefined array key "text_font" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 114PHP message: PHP Warning:  Undefined array key "text_font_size" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 115PHP message: PHP Warning:  Undefined array key "text_font_weight" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 116PHP message: PHP Warning:  Undefined variable $background_title in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 154PHP message: PHP Warning:  Undefined variable $background_text in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 155PHP message: PHP Warning:  Undefined array key "text_font" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 114PHP message: PHP Warning:  Undefined array key "text_font_size" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 115PHP message: PHP Warning:  Undefined array key "text_font_weight" in /var/www/html/xxx/wp-content/plugins/azurecurve-toggle-showhide/azurecurve-toggle-showhide.php on line 116PHP message: PHP Warning:  Undefined variable

Any help is appreciated.