YazFi will run on a "Pro" series router (see my sig line). You may want to provide more information.
When you installed Merlin did you do a hard factory reset and manual reconfiguration?
When configuring the AX88U Pro did you import a previously saved router configuration file?
If so from what previous firmware version and was it from a different Asus router?
Have you tried running the AMTM update command from the SSH AMTM CLI?
Does AMTM still fail to install YazFi if you do not have the USB drive attached? (YazFi does not require or use an attached USB drive.)
Completely disable the VPN and try again if you haven't done so already.
Install YazFi outside of AMTM if you haven't done so already to see if it similarly fails.
Feature expansion of guest WiFi networks on AsusWRT-Merlin, including SSID -> VPN, separate subnets per guest network, pinhole access to LAN resources (e.g. DNS) and more! - jackyaz/YazFi
github.com
Thanks for your reply and help. I tried to answer as accurate as possible.
Note that I checked that the routers firewall and AI protection is off during testing.
When you installed Merlin did you do a hard factory reset and manual reconfiguration? Yes. For as far as manual configuration goes, basic installation of the router on my network as the main router, i enabled the addional wifi channels, and openened the router for SSH/JSSF but that is about all I changed in the settings so far. The rest are all still standard.
When configuring the AX88U Pro did you import a previously saved router configuration file? No, started everything from zero. I didn't save a settings file (newby error, lessons learned) for the AC88u
If so from what previous firmware version and was it from a different Asus router? I can't remember the exact firmare version that was on the AC88u. It was likely a Merlin version that I installed roughly about 6 months ago.
Have you tried running the AMTM update command from the SSH AMTM CLI? If you mean after I SSH'd into router and after command AMTM and then option 'u': yes. All packages are up to date. AMTM is 3.8. If this is not what you meant, could you clarify it as I am not that famiiar with all of this (yet) ;-)
Does AMTM still fail to install YazFi if you do not have the USB drive attached? (YazFi does not require or use an attached USB drive.) I tried from the command line you provided, with and without the USB attached, VPN off and on. Both USB options don't seem to do anything and the command shell brought me back to the root position similar as after I SSH'd into the router
Completely disable the VPN and try again if you haven't done so already. Did, no change unfortunately. Also used different VPN servers in different countries, but without result
Install YazFi outside of AMTM if you haven't done so already to see if it similarly fails. I assume you mean to use the code line you provided from the routers root directory after SSH into the router? If so, I did this and it didn't work. Brings me back to the routers root directory
I only started to explore the AMTM and other features about a year ago and really appreciate the help and the time that you take to support me.
As additional info but I am not sure if this matters: I use the M1 Macbook pro-max with MacOS and windows installed (parallels) to access my router. In my testing I use the MacOS terminal app, an app called termius and also tried all off the above actions with Putty in Windows.