I decided to try out oppo's new project spectrum ROM, but it is far too buggy and I wish only to return to ColorOS. My problem is that I am unable to flash it back to my find 7 because selecting install from SD does nothing. All other options in the recovery work except for that one. I have also tried flashing TWRP and CWM through fastboot, but trying to open recovery after flashing just shows the OPPO logo for one second, then opens fastboot again. Any advice on how to get back to ColorOS would be greatly appreciated.