Thanks for taking your time @davidpfahler,
I have tried creating new instances several times, but no luck. My latest try I did get other issues however. This time it seemed to be version inconsistencies similar to the ones posted here. The solution presented in that thread (conda remove pykerberos) didn’t solve my issue unfortunatly 
I’m gonna wait a week or two and then try again with a new instance. If the same issues arise, and I still can’t find any solution on the forum, I am going to try a different service than AWS.
Many thanks, again, for your reply!