Failed to install on DWR-921 C3

Hi, I'm new to all of this and need help installing D-Link DWR-921 Ver: C3
After long days I was able to activate the JBOOT web recovery or at least I hope it is this (I attached a screenshot)


When I try to go up and install OpenWrt I get an error. (Found in a screenshot I attached)

Asking for help please!
Note - I'm not sure the original system is installed on the product from the beginning. I got it from my ISP (I added a screenshot of the main page of the original system.)

Thanks in advance
Itay

from https://openwrt.org/toh/d-link/d-link_dwr-921#jboot_web_recovery_service

If via JBOOT web interface doesn't work, it can be done on the command line with curl command:
curl -F FN=@XXXXX.bin http://192.168.123.254/upg where XXXXX.bin is the name of the -factory.bin file.

Does this work for you?

No
Returns error

curl: (52) Empty reply from server

Anyone know how to help me with this? Please! :slightly_smiling_face:

If via JBOOT web interface doesn't work, you can try on the command line with tftp command:

tftp -m binary 192.168.123.254 -c put XXXXX.bin

where XXXXX.bin is the name of the -factory.bin file.

Ok thanks i will try.

Did not work for me. Any other idea? I really need to replace the version that is there.

Sorry. No idea.

your firmware web ui looks entirely different from mine, and I noticed that C3 comes with those differences based on where it's sold to. That might be a clue, maybe your router has a locked bootloader or whatever and cannot accept custom firmware, though I can't talk about mine being the other way just yet, I will update you if it worked for me what I did to put openwrt on mine.