Build won't start from ext/ SD card

I’m using a mini VIKI lcd with an Azteeg x5 mini v3. Current smoothie build and updated config. Everything works except playing files from panel’s sd card slot.

I can see the files on the ext/ sd card location. When I select one to start the build the screen returns to the “watch” screen and nothing happens. Heating should start, but the heaters remain set to 0.

The build starts normally if I load the same file on the board’s sd card and play it from there.

Any ideas? Thanks!

Imported from wikidot

It’s an odd one, I’m not sure I have a clue here. Did you contact panucatt for help ?