[Not a Bug][Bug 1.15] Cant load custom map save games

I cant seem to load any save game of a map I have created. the map works perfectly fine if you start anew but if you save and come back, the game crashes before it will load. it can have literally nothing built on the map and only gone by 2 seconds and it wont load. I’m not sure if it happened in v1.13 as I made it then and first tested it in 1.14.

Found the fault, I cant count importers. (I typed it via notepad cause I thought it would be more versatile)