The printer displaying the message: Opening the project failed, the file is possibly corrupted. Please re-slice or re-export the project, try again.

Error name: Opening the project failed

Error code: #10504

Make sure the export from PrusaSlicer was complete and that the flash drive was Ejected properly.

Also, try a different USB flash driver and/or format your current drive to FAT32.

Export SD/USB flash drive

SD cards and USB drives