Please help. Data does not transfer from Light Burn to Thunder Nova35

When I send a file to my Thunder Nova35, Lightburn says file transferred but shows 0KB sent.
Thunder receives the file, but no image or data is transferred.
Has been working just fine and all of a sudden, I cant seem to get the data transferred over. Tried using a USB flash stick and the same problem occurs. I have updated windows, tried to re start my computer and the software, but still the same issue.
Please Help.