F5 VE in Azure - troubles with Sentinel integration

Hi!

I'm having F5 Act/Stb cluster - 2 VMs in Azure with 2 traffic interfaces only (external, internal). I use BIG-IP 16.1.3 build 0.0.12
I'm trying for the first time in my life integrate it with Sentinel and so far I fail to do it succesfully.

When following this article: https://my.f5.com/manage/s/article/K85539421 point by point:

• Install telemetry extension goes well. I have 1.32.0 build 2 version (downloaded today). curl check is succesful
• Create iRule - done
• Create a pool to handle telemetry traffic - ends up with down by monitor. (Manual suggests to use tcp monitor).
  I tried to support with hints from:

https://community.f5.com/t5/technical-articles/deploying-big-ip-telemetry-streaming-with-azure-sentinel-as-its/ta-p/278738 , where people suggest to add static route the via internal vlan:

net route telemetry {
    description "Allows monitor to work"
    interface /Common/internal
    network 255.255.255.254/32

or changing port lockdown mode:

• Create a virtual server to listen for Telemetry traffic
• Create a request-log profile
• Attach the request logging profile to the virtual server

And when it comes to deploy the declaration (which I do via curl with .json file, I get:

Has anyone passed through some manual integrating F5 with Azure Sentinel succesfully?
Or maybe I'm doing here some obvious mistake?

Thanks in advance for your help