Rut955 fail to resolve hostname

Hello Teltonika
I have RUT955 has tendency of fail to connect on RMS platform
when I login in the device I Found the error of fail to resolve host name on rms part
SO what could be the cause of it and how to resolve it permantent because its repetitive

Which firmware version you’re running on?
Make sure you’re using latest.
And your RMS config should look like this: