From both a cart checkout item and a reg pro registration, near the end of the process, the software redirects to paypal sanbox and then give this error:
Bad Request
Your browser sent a request that this server could not understand.
Size of a request header field exceeds server limit.
Cookie: cwrClyrK4LoCV1fydGbAxiNL6iG=bjG92p9uMr_u .... etc.
Please help?
Rich