I had the same issue, and sent an email to Boris -- he got the server back running promptly.
I also added a FAT32 formatted USB memory to the TP-LINK TL-MR3020 that runs Meteobridge .. as he says, this should prevent the issue in the future if the config server is not available when the device reboots.
What I don't know is whether the USB stick can be plugged into the hub used for the USB2->USB1 adapter that a USB datalogger needs. My setup uses TCP/IP to VirtualVP, so I can't tell if the save of the working firmware would work on a USB stick plugged into a hub or not.
Best regards,
Ken
btw.. I have a new testing site on e-rice.net at
www.saratogawx.net and it's driven by Meteohub