There are two massive bugs which make this app unusable.
1) When you register for MWC, the form requires you to enter your address, but it forces you to use an invalid address format that does not exist in the USA. Specifically, “House Number” is a required field after you enter the street address. You cannot leave this field blank, you cannot enter valid text like “Suite” or “Unit”, etc. You also cannot enter alpha-numeric characters, so if your “house number” is A or 23C, etc, you’re out of luck.
2) That then causes a second bug. When you enter your credit card information, since the app forces you to use an invalid address format, credit card payment fails because the address on the form does not match the address on file with the credit card company.
Perhaps the app works if you have a address that also has a “house number,” in addition to your street address.
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