Since the CXDLP V3 release some users have experienced an error message (“Failed to get the model file data”. screenshot below) when the user is transferring the sliced files to the printer.

crédit: @the algar
To avoid this issue please follow these steps:
1- Update to the latest firmware available from Creality.
2 – Choose the CXDLP V3 in the printer settings in Lychee Slicer. (screenshot below)

Make sure all your resin settings are not at zero, in the Burn-In Layers and Normal Layers section, Light-Off-Delay included, you can input a small value like 250ms…
3 – Update to the latest version of Lychee Slicer available: https://mango3d.io/downloads/
UPDATE:
4 – If you still have this error make sure the profile you are using is the default one provided or a duplicate. (To duplicate a profile, open one and use the duplicate icon in the top left corner)
Don’t use the Add New Resin, as it will add some hidden values that the printer will flag as corrupted data. Delete any profile you created using this button.

This will be patched in the next build post 3.7.1.