This article suggest you should contact Showbox support when that app does not work on BlueStacks.
You will be able to escalate the resolution of an issue inherent in Showbox
All users using Showbox on BlueStacks.
BlueStacks versions affected
BlueStacks version 4.140 and above.
You may have experienced "Connection error. Check your internet connection!" (see the screenshot below) while using Showbox. This issue has been observed on all Android devices and emulators and seems to be an issue inherent in Showbox.
Please contact Showbox's technical support and escalate this issue and for better assistance on this matter. We'll be glad to update you when we discover that Showbox has resolved the cause of this issue.
We genuinely appreciate your choosing BlueStacks. We hope you enjoy using it. If you have any further questions, please contact us at support at bluestacks dot com. Thank you very much.
Last updated on October 3rd, 2019.