LTAP-MINI: internet and roaming

hello. I have this device and it has worked well except that I have a problem with the LTE internet and roaming activation.
If roaming is not activated, it does not allow me to change the LTE interface to running and it does not give me internet; However, when reviewing the LTE Module data, it appears registered on the network with an assigned IP but does not appear running.
Does anyone know what could be preventing me from having internet without active LTE roaming?
thank you
Specifications

  • RB912R-2nD-LTm (modem not included)
  • QUECTEL RM500Q-AE LTE Module
  • RouterOS 7.12