Are you using a default setting or did you customize the Cloud App Launcher?  If you are using default settings then please open a support ticket.

The attached error when click on 'Continue' option 

Hi Danish,

For the download issue:
This relates to the network, large files download times out. The download timeout is 60 seconds by default, we will consider allowing users to custom download timeout.

When the issue happens, it’s suggested to click the Try again button, it will try again to download the files. The respective operation of the three buttons on this message box is as follows:
1. Cancel: Cancel running the application.
2. Try again: Try again to download the files, supporting download resuming.
3. Continue: Ignore the current file download failure, continue to download the next file, then go ahead to run the application. The application might fail to run because the file is not downloaded.

For the hash code issue:
Cloud App Launcher compares the hash code of download files and files on the web server to make sure the correct files are downloaded. From the screenshot you attached, it looks like all the file hash codes failed to be validated. This could be caused by the security software, please try turning off the security software.

I see you have provided more information on ticket 7094. I will also reply to you on the ticket.

Regards,
ZhaoKai

Is it possible to download the OFFLINE instealler to a local folder.
If so, then do that. You can put the folder on a shared drive and install onto all of machines.
This was, it only needs to download sucessfully ONCE.