I'm running windows 11 and the the windows firmware installer worked fine for me. This page has the drivers package installer and the firmware installer for both windows and mac. Here is the link for that: Previous Firmware Installer. What I was able to do was track the down the previous version number of the old firmware and track down the firmware installer for it.

I probably ran into a lot of the same things you found. This happened to me to last week and I have finally taken the time to try and research and fix it today. But I can't seem to find a page where I can add my name to it. Second thing, does anybody know where I should go or what to search to put my name on the class action lawsuit against Epson for this issue? I have found several websites/articles explaining the lawsuit and all. First and most importantly, does anybody know where I can find old firmware for my printer so that I can downgrade the firmware back to a version that will work? I have found several guides online that seem to show how to install the old firmware, but I am having trouble finding the file itself. There is even a class action lawsuit about it. I looked into it online after the fact and I see several people have had similar issues over the past few years. But now I cannot use my printer because it refuses to acknowledge my black ink anymore. In fact, I even printed something this morning without issue. It has worked perfectly fine up until this point. It just so happens that not too long ago, I purchased new black ink for my printer, which happened to be 3rd party ink. Once it finished, I noticed that there was a message on my printer saying the black ink could not be recognized. In my naivety, I decided to update the firmware. Earlier today, I got a notification on my computer saying that a firmware update was available for my printer.

Epson printer firmware reset