Error message received from WP

Hello,

I have been receiving this message from wordpress about a fatal error on my site, although the site seems fine.

Any ideas?

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When seeking help with this issue, you may be asked for some of the following information:

WordPress version 7.0

Active theme: GeneratePress (version 3.6.1)

Current plugin: Ad Inserter Pro (version 2.8.17)

PHP version 8.3.30

Error Details

=============

An error of type E_ERROR was caused in line 167 of the file /home/letters/public_html/wp-content/plugins/ad-inserter-pro/includes/functions.php. Error message: Uncaught Error: Undefined constant "DEFAULT_REPORT_DEBUG_KEY" in /home/letters/public_html/wp-content/plugins/ad-inserter-pro/includes/functions.php:167

Stack trace:

#0 /home/letters/public_html/wp-includes/class-wp-hook.php(341): ai_check_report_api()

#1 /home/letters/public_html/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters(NULL, Array)

#2 /home/letters/public_html/wp-includes/plugin.php(570): WP_Hook->do_action(Array)

#3 /home/letters/public_html/wp-cron.php(191): do_action_ref_array('wp_update_plugi...', Array)

#4 {main}

  thrown

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