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I have a V20 system and am trying to install an SBC on a raspberry pi4. In the past I have had no issues but on the 3cx site all the write ups are for the raspberry pi5. Anyone else had luck recently?

Hey Guys, we're seeing a similar issues. We have fully updated our Pi4 with the latest firmware and any attempt to install or upgrade an SBC using the latest 3CX ISO referenced in the link below.
https://www.3cx.com/blog/releases/raspberry-pi5-sbc/
To be clear, the Pi4 is fully up to date on firmware and we have used the most up to date bookworm. Storage has been flushed.
We are unable to select OK to proceed with the installation. Has anybody any ideas on where to go from here please?
sudo bash -c "$(wget -qO- http://downloads-global.3cx.com/downloads/sbc/3cxsbc.zip)"
Thanks for the suggestion but it doesn't make any difference.Press the tab key and then the enter key.
Thanks John, that's worked perfectly. I think it must have been an oversight by a busy engineer!Hi Colin,
"OK" is already selected red, you are simply supposed to press ENTER. It's on the next page on the agreement screen that you need TAB to highlight "Accept".
If you click the Pi article linked in the blog post it gives a specific command that you need to paste to install the SBC application:
Bash:sudo bash -c "$(wget -qO- http://downloads-global.3cx.com/downloads/sbc/3cxsbc.zip)"
If you used the old command, you will be stuck and the wizard will not proceed.
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