Firmware update doesn't work

I try to update AXC F 2152 from firmware 2020.0.1 to newer version.
During transmission of containerfile no warnings of errors.
Controller is restarting and RUN-led en FAIL-led are both flashing fast.
After warm restart RUN-led is on, FAIL-led is off.
But firmware is stil 2020.0.1.
I’ve tried to update to 2022.3 and to 2020.3.1, both with the same result.
What to do?

I also did a firmware update to 2022.3.
The update did work, but I wasn’t able to connect to the controller via PLCnext Engineer. The WBM still works but not the connection via Engineer.
And before you ask, the IP address and SubNet settings are correct. I did connect to the controller when running FW 2022.04
As a short therm fix I have downgraded to 2022.04 again - all is working as it should.
Some information would be nice!

Hello Robw, hello Peter
please execute the command „sudo recover-axf2152 1“ before the FW-Update (Project Reset).
Please note after Reset, the PLC IP address will be reset to default: 192.168.1.10
BR Eduard

Thank you Eduard for your reply.
I’am quite new here and I suppose the command has to be given in the Linux environment in the controller.
How do I get there? (or: how do I give the command?).
And is it really „axf2152 1“ or „axcf2152 1“?

After a reset to factory settings the firmware-update was executed well.
Thanks.