It could be that the daily MasterCard transaction limit has kicked in...Has the problem returned for Mastercard?
https://forum.redfox.bz/threads/remove-mastercard.69841/page-2#post-443022It seems Mastercard is not an option currently, only Bitcoin and Visa are shown. Has the problem returned for Mastercard?
Mastercard is not available at this time. There are some technical issues. We are working on it, but we can not say when it will be back yet.