@Jiaz, I'm back with the same issue. I was able to test some things out.
1. I'm able to successfully download files from Rapidgator using the Microsoft Edge browser. Other browsers like Internet Explorer, Chrome, and Firefox will have a connection error in the middle of the download.
2. I've also tried different download managers and get the same result as Jdownloader. Connection Error.
3. I've tried disabling every firewall I have and still the same issue persists only for rapidgator.