Hi,
We are facing image problem after wplms 3.9.1 update and wordpress 5.1.1 update.
Some images does't show, even after re-uploading images.
It show 403 forbidden error when we inspect images in chorme.
We also try to remove this error by replacing new version of wplms to older versions but still its doesn't work
Well please check your .htaccess file if you have restricted the access to your media files or not.
Secondly please check the file permissions of the wp-content/uploads folder and all its subfolders and its files .
file permissions must be : 644 and folder permissions must be 755 . .