Unable to Spend my Coins

As the title states, I am unable to spend my coins on this Website.

When I click on a Microtransaction the button to "Buy" is replaced with "Buy Coins". I can spend coins in both games without issue.

When I look at my account it shows I have X Number of coins available to spend.

Is this a known issue or can someone assist? I have reset my browser thinking it was a cookie or cache issue without any luck up to this point.