after restart winbox does not find router (and webfrontend also does not work)

RouterOS Beginner Basics
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Hi Guys,

fighting with my first mikrotik router ATLGM LTE18.
i got the LTE connection running (works in german telekom network only with 7,8 FW, not before)
Now i tried to get the device reboot ready and after a reboot i can not access it via winbox or via webfrontend.
it replies to pings (i set ip to 192.168.178.254 which is in my network)

what am i missing?
If i do a full reset i can access the device via winbox. i set IP from 192.168.188.1 to 192.168.178.254 and reboot and can still access it after a reboot. i enable LTE and voila no access anymore???

Thanks for help
Wolf.
(dont want to send it back to the seller)

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if you do not share something to read…

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i finally managed it today in the morning, somewhere in the firewall settings i needed to set “ethernet1” name to LAN in a dropdown list and enable Service for winbox and port 80 for my local adress range in LAN. The funny thing (i can reproduce it): if i reset the router to default config eveything is fine until i change LAN ip adress to my local net and reboot the router, than its not accessible anymore after a reboot.

Wolf