Errors (only recently)

Turned on WP Debug after site started showing 500 errors. The following error ALL seem related to this plugin. Please advise.

Notice: Undefined index: crop in /home/wwwwing/public_html/wp-content/plugins/product-brands-for-woocommerce/includes/class-frontend-display.php on line 117

Notice: Undefined index: crop in /home/wwwwing/public_html/wp-content/plugins/product-brands-for-woocommerce/includes/class-frontend-display.php on line 118

Notice: Undefined index: crop in /home/wwwwing/public_html/wp-content/plugins/product-brands-for-woocommerce/includes/class-frontend-display.php on line 119

Fatal error: Uncaught Error: Call to undefined function is_woocommerce_activated() in /home/wwwwing/public_html/wp-content/themes/arcade/inc/class-arcade-structure.php:84 Stack trace: #0 /home/wwwwing/public_html/wp-includes/class-wp-hook.php(286): Arcade_Structure->arcade_custom_storefront_markup(”) #1 /home/wwwwing/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #2 /home/wwwwing/public_html/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /home/wwwwing/public_html/wp-settings.php(467): do_action(‘init’) #4 /home/wwwwing/public_html/wp-config.php(89): require_once(‘/home/wwwwing/p…’) #5 /home/wwwwing/public_html/wp-load.php(37): require_once(‘/home/wwwwing/p…’) #6 /home/wwwwing/public_html/wp-blog-header.php(13): require_once(‘/home/wwwwing/p…’) #7 /home/wwwwing/public_html/index.php(17): require(‘/home/wwwwing/p…’) #8 {main} thrown in /home/wwwwing/public_html/wp-content/themes/arcade/inc/class-arcade-structure.php on line 84

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