Upload image Error 500 Can't write image data

Problem

When you upload image in Image Manager, but it freezes with the error on the right corner.

Error

Can't write image data to path (/home/{user}/public_html/storage/images/wpThumbnails/{image}.jpg

Solution

1. Go to cPanel -> File Manager

2. Make a folder and name it "wpThumbnails"

/home/{user-name}/public_html/{sub-domain-folder}/storage/images/wpThumbnails

3. Go to RVsitebuilder to upload image again.