19.11.2 makes no difference according to the screenshot of @AxelS above.
Else … The error message you got usually is a sign for trying to run the flash-for-windows.bat inside the ZIP file (as Windows can treat it as a folder you can operate in), you would have to unzip the ZIP file first.
I hope you have a backup of all your important data before you perhaps successfully run this. It may be a downgrade at this point, and if it even works, it may require a factory reset to boot successfully.
To play it safe I would advise to contact support … https://support.fairphone.com/hc/en-us … but that is not a fast option, unfortunately. Calling them might get faster results, but not on a weekend.
I thought about what I would try in this situation … but I have a backup of my stuff before any update, so I can be intrusive and accept the loss of my data on the phone … anyway, things to try …
-
Format the system partition before trying to install again.
- Boot the TWRP recovery without flashing it, see twrpwoflashing.
- Follow this guide here from “Addendum - How to format any other partition than Data” on, conveniently the example used there is the system partition, so just go along … 🇬🇧 🇩🇪 ✏ Installing the Fairphone 2 from scratch in case of failure / Komplette Neuinstallation des Fairphone 2 im Fehlerfall.
- Reboot back into Fastboot Mode and try installing again.
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If that didn’t help … Apart from the manual install file for Fairphone OS 21.3.0-rel.2 Fairphone did release the manual switcher file to go back to Fairphone OS 21.3.0-rel.2 from Fairphone Open OS 21.3.0-rel.2 (the OS variant without preinstalled Google Apps and services). It’s here … fp2-gms-21.03.0-rel.2-manual-switcher.zip.
It’s not meant to do a complete install, I think, but the system.img is in it, and as flashing this is what’s failing now … perhaps this could do something?
Don’t use any other file from that page, just the manual switcher file. -
If that didn’t help either … In case it gave the same error message when flashing system, perhaps it’s the fastboot command version acting up.
Now back to what @Alex.A already proposed …
In the unzipped install folder, there’s a folder “images”, inside this folder you’ll find the system.img file.
I’d try to do what the install script tries to do with it, but with a different fastboot command version.- Do point 2. only (“Get the fastboot command to work”) of this guide here … 🇬🇧 🇩🇪 ✏ Installing the Fairphone 2 from scratch in case of failure / Komplette Neuinstallation des Fairphone 2 im Fehlerfall
- Copy the system.img file mentioned above to the folder to where you unzipped the platform tools including the fastboot command.
- Navigate to this folder in a command line and do
fastboot flash system system.img
Out of further ideas for the moment.