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Thanks for attaching the troubleshoot file it was really helpful!
I see that your device is running firmware version RUT2XX_R_00.01.14.5. Please try to update the firmware of your device, it is normal that when you purchase a new device it comes with an older version of firmware. You can find the latest version of firmware for your RUT240 at this link: https://wiki.teltonika-networks.com/view/RUT240_Firmware_Downloads
The latest version is RUT2_R_00.07.01.4 you can upgrade following the next instructions:
1. Navigate to the System tab and click the Firmware option.
2. There you can upgrade to the next available firmware through the one available on the server or the one that you downloaded.
If you want to read more about this, you can find extra information about this topic at this Teltonika Networks Wiki link: https://wiki.teltonika-networks.com/view/RUT240_Firmware_(legacy_WebUI)#Firmware_Upgrade_Settings
This could fix your issue, in case that it doesn't please post a comment and I would be happy to help you.
This upgrade has now been completed and the same problem exists.