Overdrawn coin messages means there is negative balance in your USD wallet. Your balance might show a balance of $0.00, but due to rounding, the negative balance may be a fraction of a cent. When this occurs, you are not able to make any transfers out of your account. To correct this, sell some crypto or deposit more USD into your account. 


The message may look similar to one of the following: 

This is an example of the error on the Pro app.
This is an example of the error on the Simple app.