Source code error in td-subscription

When posting in a couple spots on two websites that have Newspaper Theme, I have been encountering the following error:
Uncaught Error: array_key_exists(): Argument #2 ($array) must be of type array, null given
in /home3/garretso/public_html/wp-content/plugins/td-subscription/includes/td_subscription.php on line 3276

Call stack:

td_subscription::td_post_theme_settings_mb_save_filter(NULL, ‘4880’)
wp-includes/class-wp-hook.php:324
WP_Hook::apply_filters(NULL, array)
wp-includes/plugin.php:205
apply_filters(‘wpalchemy_filter_td_post_theme_settings_save’, NULL, ‘4880’)
wp-content/plugins/td-composer/legacy/common/wp_booster/wp-admin/external/wpalchemy/MetaBox.php:880
WPAlchemy_MetaBox::apply_filters(‘save’, NULL, ‘4880’)
wp-content/plugins/td-composer/legacy/common/wp_booster/wp-admin/external/wpalchemy/MetaBox.php:2081
WPAlchemy_MetaBox::_save(4880)
wp-includes/class-wp-hook.php:326
WP_Hook::apply_filters(NULL, array)
wp-includes/class-wp-hook.php:348
WP_Hook::do_action(array)
wp-includes/plugin.php:517
do_action(‘save_post’, 4880, WP_Post, true)
wp-includes/post.php:5110
wp_insert_post(array, false, true)
wp-includes/post.php:5212
wp_update_post(array)
wp-admin/includes/post.php:453
edit_post()
wp-admin/post.php:227

Placing this into ChatGPT, it says there’s an error that needs to be fixed in the td-subscription plugin. “Uncaught Error: array_key_exists(): Argument #2 ($array) must be of type array, null given”

“What This Means:
PHP’s built-in function array_key_exists() expects the second argument to be an array, but it was given null instead.

In your case:

File: /home3/garretso/public_html/wp-content/plugins/td-subscription/includes/td_subscription.php

Line: 3276

Cause: The plugin tried to check if a key exists in an array, but that array was actually null.”

While I could possibly fix this manually, any suggestions otherwise?

I do not know how to test in other php versions…

A function is trying to use array_key_exists() on a variable that is null instead of an array.

**How to fix:**
– The plugin author should ensure that the second argument to array_key_exists() is always an array.
– As a quick fix, you can wrap the call with an is_array() check.

**Example fix:**

php
if (is_array($array) && array_key_exists($key, $array)) {
    // ...existing code...
}

I only have the options for PHP versions 8.1, 8.2, and 8.3 using the instructions provided. Updated to 8.3 from 8.2 and issue still persists.

That did fix it; thank you!