recently, after trying to join my Minecraft Forever Stranded Server , I wasn't able to without further explanation. After trying to restart in the webinterface the server instantly shut down after trying to start. I contacted the support about this, which found an error in the savegame about a bugged block and send me further data on i.e. the blocks location. They suggested me backup to an earlier version of the world, which unfortunately wasn't possible, as we were inactive for a couple of days. After contacting the support again, they refered to some third-party tool to edit a world from the outside, but they couldn't name it or give further explanation on it.
Do any of you know how to resolve the issue? Thanks!