[SOLVED] CB User Manager not displaying CBSubs record

Ive got a problem with CB User Manager where it is not returning CB data but just the attached error msg
CB User Manager Path Cannot be Empty
I turned on max error reporting and got this response
An error has occurred.
0 Path cannot be empty
/var/www/kclg.org.au/public_html/components/com_comprofiler/plugin/user/plug_cbcore/library/Field/ImageField.php:989
Any suggestions to resolve this appreciated
regards
Swampy5

Hi Sorry I left out the important version info
php 8.1.16
ubuntu 20.04
cb 2.8.0
cbsubs 4.6.1
am about to downgrade to php 7.4 and will report the outcome
swampy5

Ok so downgrading to php7.4 fixed the problem - it would seem compatibility issues with php8 and CB 2.8
However another site I manage CB is still working ok with the php 8.2.3 and cb2.8.0 platform on ubuntu 18.04 
I tried php  8.0.23 and 8.2.3 but 7.4 seems to be the only version that works
regards
Swampy5

CB is compatible with PHP 8. PHP 7 is just suppressing the error.

The problem is it's trying to read the image size of an image that doesn't exist. Specifically a canvas image. You have a value stored in the canvas column of your database, but the canvas image doesn't exist in the file system.

Thanks Krileon - spot on as usual - so I did some phpmyadmin comprofiler investigation and discovered  that for some reason a solid green canvas had become default with file name canvas_735_5b1638a5e5878.jpg - which didnt exist on the server as you correctly pointed out
Used an update query to replace that particular canvas field entry to Null and then successfully upgraded the system to php 8.1.17 which is now delivering CB and CB Subs data accurately

swampy5