Hello!
Everything is configured correctly except for the AP IP parameter.
The IP address of the LAN network and the IP address of the Hotspot must not be on the same subnet. Therefore, you need to change this parameter.
During testing, changing this parameter helped.
A new version of the firmware has also been released. You can download it from the link and update the device:
https://wiki.teltonika.lt/view/RUT9xx_Firmware
Regards, Aliaksandr!