okay, I am sharing my checking process and fix with you. This issue generally happens with the image source. Here are the steps that I follow:

1. Go to the issue page and disable rows one by one.
2. Find which rows is behind the issue.
3. Then find the addon from the row.
4. Then go to the addon site.php file.
5. It could be in templates/template_name/sppagebuilder/addons/addon_name/site.php
6. Then find line similar to this. Check for img src in the file.

   $output .= '<img src="' . $service_img . '">';

7. Then change the line to this:

   $output .= '<img src="' . (is_string($service_img) ? $service_img : $service_img->src) . '">';

Hopefully, it will solve the issue.

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