Error code: 7 Failed to download file

I have been failed in updating Libronix. Whenever I made such an attempt, I used to get the following error message, saying
Error code: 7. One of them I recorded, it says it failed to download file ftp://ftp.logos.com/lbxbooks/CALTGCGS.lbxlls.

Libronix Update
Update Error
Libronix Update could not be completed. Please run Update again at a later time. No changes were made to your Library System
Diagnostic and troubleshooting information is available at:
https://www.logos.com/ways-to-upgrade-to-logos-8
Click “Close” to finish.
Error code: 7
Failed to download file:
The LE and KF Resources scripts have already been tried by me. I have bought those earlier. But nothing proved fruitful.
I need an expert’s help now.
Can you give me any solution?
Please help.
