No worries.

It's because your theme has a unique way to handle our currency format.

Revert back, and the app would work as expected.

Follow these steps:

1. Go to your Settings ->

2. General ->

3. Store currency - Change formatting ->

In "HTML with currency" enter:

$###{{amount}} USD

In "HTML without currency" enter:

$###{{amount}}

4. Click Save.

* This applies for stores with USD default currency, follow the same steps and change the "USD" and "$" for other currencies accordingly.