Why can't I buy gems?

[Windows Central Question]

why cant i buy gems

when ever i try to buy gems in dragon mania legends and i try to pay with a credit card it say "cant sign in". what do i do

 

[RumoredNow]

Re: why cant i buy gems

Make sure your date and time are correct for where you are at...

Is your Microsoft Account parental supervised? It may need further authorization...