hi aerdna,
I expect you are using a comma instead of a decimal point. I know some countries use a comma but I thinks most use a point :)
Anyway, enter is as
asin(0.37)
that should work just fine :)
$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{sin}}^{\!\!\mathtt{-1}}{\left({\mathtt{0.37}}\right)} = {\mathtt{21.715\: \!617\: \!283\: \!264^{\circ}}}$$
Yep, it did for me :)