Hey there @Black-Thunder-3 and welcome to the forums! Sorry to hear you're not able to get some mysteries finished in the Asgard area.
Can you take a screenshot of your full map of Asgard so we can see which mysteries and treasures you've already collected?
Also, if you are having trouble with some specific mysteries, can you take screenshots showing what you're able to see in the areas where they should show up?
Finally, are you also having any trouble with treasures not being in the right spot?