FYI from my debug log

Hi Pippin
Thanks for your great plugin.

I noticed in past few days the following:

[15-Jul-2021 19:35:56 UTC] PHP Warning: Undefined property: WP_Error::$tested in /home/…/public_html/wp-content/plugins/companion-auto-update/cau_functions.php on line 1044
[15-Jul-2021 19:35:56 UTC] PHP Fatal error: Uncaught TypeError: Unsupported operand types: string – string in /home/…/public_html/wp-content/plugins/companion-auto-update/cau_functions.php:1046
Stack trace:
#0 /home/…/public_html/wp-content/plugins/companion-auto-update/cau_emails.php(173): cau_list_outdated()
#1 /home/…/public_html/wp-content/plugins/companion-auto-update/cau_emails.php(27): cau_list_outdated_software()
#2 /home/…/public_html/wp-includes/class-wp-hook.php(292): cau_outdated_notifier_mail()
#3 /home/…/public_html/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()
#4 /home/…/public_html/wp-includes/plugin.php(551): WP_Hook->do_action()
#5 /home/…/public_html/wp-cron.php(138): do_action_ref_array()
#6 {main}
thrown in /home/…/public_html/wp-content/plugins/companion-auto-update/cau_functions.php on line 1046
[16-Jul-2021 17:00:17 UTC] PHP Warning: Undefined property: LiteSpeed\Img_Optm::$_img_in_queue in /home/…/public_html/wp-content/plugins/litespeed-cache/src/img-optm.cls.php on line 110
[18-Jul-2021 23:50:21 America/Puerto_Rico] PHP Warning: Undefined array key “twicedaily” in /home/…/public_html/wp-content/plugins/companion-auto-update/admin/status.php on line 79
[18-Jul-2021 23:50:21 America/Puerto_Rico] PHP Warning: Undefined array key “weekly” in /home/…/public_html/wp-content/plugins/companion-auto-update/admin/status.php on line 79
[18-Jul-2021 23:50:21 America/Puerto_Rico] PHP Warning: Undefined array key “twicedaily” in /home/…/public_html/wp-content/plugins/companion-auto-update/admin/status.php on line 79
[18-Jul-2021 23:50:21 America/Puerto_Rico] PHP Warning: Undefined array key “weekly” in /home/…/public_html/wp-content/plugins/companion-auto-update/admin/status.php on line 136
[18-Jul-2021 23:50:21 America/Puerto_Rico] PHP Warning: Undefined array key “weekly” in /home/…/public_html/wp-content/plugins/companion-auto-update/admin/status.php on line 136