Minecraft Bedrock Edition for Nintendo Switch always crashes

Hello!
I bought the normal Minecraft Switch edition long ago, and when the Bedrock edition came out, i got it after.
It worked only a short time, with problems tho, and now, no matter how often i redownload it, it always crashes after a long loading time (Black screen).
On other Switch Accounts it works almost perfectly, but since i only pay the online membership on my main account, and i rather play online, it's a little bit annoying.
Does someone know how to make it work on my main account aswell??