Can't continue registration for North America seller accunt

I am a UK-based Amazon seller and I am attempting to expand my selling account to the North American marketplace. I have followed the registration process step-by-step, but when I try to complete the registration, I encounter the following error:

'Invalid request URL from client. The requested URL is not well-formed. RID: 9SET00EE7W5WVBZ4D8AB Timestamp: 2024-10-23T07:27:08.030Z'

I have tried different browsers and cleared my cache, but the issue persists. The error appears after I input my information and attempt to move to the next step in the registration process.

Could you help me understand what might be causing this issue, and direct me to the right team or resource to resolve it? I’m keen to complete my registration and begin selling in North America as soon as possible.