Hello @ElizabethP8516 ,
I made a copy of your email (CSCTEST_) to check my suspicions, and confirmed that the issue is your email's current design color defaults. Under the Design tab of the lefthand menu, you'll see a space for Buttons' default colorings. They're currently both set to white. You'll want to go ahead and change the default to some other color, or change the button text color, or both.
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