HTTP/HTTPS isuse with WC-Vendors-Pro plugin

Hi guys, Please before you join my project read good my issue. I purchased WC Vendors Pro plugin and I'm working with it 3 month's now there is no issues, but when I add SSL Certificate to my site I'm facing a problem in vendors panel when I try to upload images I got this error " An error occurred in the upload. Please try again later." I deactivated all plugins and do all the basic solutions but not fixed.. I contacted with the plugin support team, and they said this issue because of SSL Certificate we advice to install this plugin Really Simple SSL plugin and activated, but still not solved my issue. I see some other members in the support forum have solved by the same plugin but with me I can't I don't know the reason. You can search about solutions here [login to view URL] or search about my issue here [login to view URL] I'm sure you will find the solution, many people solved by this Really Simple SSL plugin So I'm looking for someone who have experience in WC Vendors Pro, and how to solve it I need to upload images in Vendors panel. Check my attachment to see the issue please here is my vendors link [login to view URL] username : ekats password : 123456 go to add product and try to upload image My budget is 50$ Thanks