For quick answer follow these orders:
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Load configuration (if it is possible with SIM card log in), It will show important data (Serial number, Firmware version)
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Go to tab "own AT commands"
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To "AT command" row put command AT^SCERR?
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Confirm by "Send"
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Afterwards it will show the status of issue
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Once it is done, please do print screen
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Do print screen of sheet "General".
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Right now please go to the website https://support.2n.com and write a short notice of the issue.
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In case of some difficulties with ports RS-232, RS-485/M-bus, do print screen of their lists and go to the page https://support.2n.com .