Consistent error in website error_log, how can I find the source? PHP Warning: A non-numeric value encountered in xxxx

[misteraitch1]

I'm getting the following error multiples times each day but struggling to lock down the source to fix it (I can find the php file of course, but not what is causing the error) Can anyone help?

[12-Mar-2024 13:09:58 UTC] PHP Warning: A non-numeric value encountered in /home/xxxx/xxxxx/wp-content/plugins/elementor/includes/libraries/bfi-thumb/bfi-thumb.php on line 748
[12-Mar-2024 13:09:58 UTC] PHP Warning: A non-numeric value encountered in /home/xxxx/xxxxx/wp-content/plugins/elementor/includes/libraries/bfi-thumb/bfi-thumb.php on line 750

Thanks
David