The EP-68 is a motherboard version. On the circuit board, you will find this printed in white silkscreen lettering. This is the most important part of the keyword. Flashing a firmware intended for an MXQ Pro 4K (with a different board like S805 or S905) onto an EP-68 will hard-brick the device.
Wait for the confirmation dialog stating the drivers installed successfully, then restart your PC. Step 2: Prepare the Flashing Tool Download and extract . Firmware Rk3128 Mxq Ep 68