Having re-read the thread, I think your problem may be different from what I originally thought - I’m not 100% sure whether flashing the binary image will solve it, and you should only try to do that if you completely understand what you’re doing. You mention software engineering - maybe they can tell you if they can use the binary image to fix your phone. Also, you could open a support request with Fairphone (this forum is a community forum, and responses here are not responses from fairphone).
The instructions on the page I linked to, are the instructions for using the recovery files on that page. If the recovery files don’t work, you can consider to flash the original firmware, which is what the binary images are for. You’d only need a single file, which one depends on the partition layout (original FP1’s had a different layout). I was assuming you’d be familiar with the procedures, as you’re using MobileUncle, which looks like something that you’d only know about and use if you know about firmwares etc. If, as a last resort, you do decide to flash the binary images, there’s a basic explanation of the procedure over on XDA, here - see under “How to restore Fairphone if you totally bricked it”.