Issues saving with PHP 8.0.16, WP 5.9.2, two fixes

Our server was updated to newer versions of PHP and WP recently and I found that I was unable to Save Draft for a new sermon. The error was:

WordPress version 5.9.2
Current theme: High Responsive Child (version 1.0.0)
Current plugin: Sermon Manager for WordPress (version 2.16.8)
PHP version 8.0.16

Error Details
=============
An error of type E_ERROR was caused in line 232 of the file /…/public_html/wp-content/plugins/sermon-manager-for-wordpress/includes/class-sm-dates-wp.php. Error message: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /…/public_html/wp-content/plugins/sermon-manager-for-wordpress/includes/class-sm-dates-wp.php:232
Stack trace:
#0 /…/public_html/wp-content/plugins/sermon-manager-for-wordpress/includes/class-sm-dates-wp.php(201): SM_Dates_WP::update_term_dates(‘wpfc_service_ty…’, Array)
#1 /…/public_html/wp-includes/class-wp-hook.php(307): SM_Dates_WP::save_terms_dates(10821, Object(WP_Post), true)
#2 /…/public_html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array)
#3 /…/public_html/wp-includes/plugin.php(474): WP_Hook->do_action(Array)
#4 /…/public_html/wp-includes/post.php(4676): do_action(‘save_post_wpfc_…’, 10821, Object(WP_Post), true)
#5 /…/public_html/wp-includes/post.php(4789): wp_insert_post(Array, false, true)
#6 /…/public_html/wp-admin/includes/post.php(426): wp_update_post(Array)
#7 /…/public_html/wp-admin/post.php(227): edit_post()
#8 {main}
thrown`

I was able to resolve this issue by changing sermon-manager-for-wordpress/includes/class-sm-dates-wp.php. as follows:

232c232
< if (count($the_terms)>1) {
—
> if (is_countable($the_terms) && count($the_terms)>1) {

Also I noticed in the error_log file had this warning:

PHP Fatal error: Unparenthesizeda ? b : c ? d : eis not supported. Use either(a ? b : c) ? d : eora ? b : (c ? d : e)` in /…/public_html/wp-content/plugins/sermon-manager-for-wordpress/views/wpfc-podcast-feed.php on line 165

sermon-manager-for-wordpress/views/wpfc-podcast-feed.php
165c165
< ‘terms’ => is_numeric( $terms ) ? intval( $terms ) : false !== strpos( $terms, ‘,’ ) ? array_map( ‘sanitize_title’, explode( ‘,’, $terms ) ) : sanitize_title( $terms ),
—
> ‘terms’ => is_numeric( $terms ) ? intval( $terms ) : ( false !== strpos( $terms, ‘,’ ) ? array_map( ‘sanitize_title’, explode( ‘,’, $terms ) ) : sanitize_title( $terms ) ),

That seems to have stopped the warnings, too. Hope someone finds this helpful.