Help: Form removing donation amount when submitting

Hello! We are having an issue with our donation form where someone will attempt to make a donation and they receive this error message: "Gateway Invalid argument error Invalid amount". It has happened enough that I don't believe all of these people are forgetting to put in an amount and that the amount is actually being wiped out when they try to submit the donation. We noticed that the issue started happening when we switched websites from SquareSpace to WordPress.

Donation page: https://jslmi.org/donate/

Thanks!

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