I've restarted the Raspberry Pi 2 and the Ekos 1.5 VM, and now it's working like yesterday again.
connection works, receiving camera parameters, temperature readout and setting works, making captures works.
(but with 8 bits cropped data)
Here are the debug log files and the fits files I've captured
(2 of 90 seconds, 2 of 300 seconds)
I have tested Indi on Raspberry Pi, found that timer blocks at the end of the process when maximum resolution is set,
but after smaller resolution is set, image can be downloaded, you can try this.