Header export to CSV fails

[jfarwer]

Exporting a csv of email headers in the Processing module fails with the error

HTTP Status 400 – Bad Request

Type Exception Report

Message Invalid character found in the request target [/epadd/export-headers?archiveID=1bd1034dd155e0a65266b39b9d06bf10e0f4f638c3b8cfdd73f8c148b9482408&exportType=csv&dir=C:\/Users/XXXXX/ ]. The valid characters are defined in RFC 7230 and RFC 3986
HTTP Status 400 – Bad Request

Type Exception Report

Message Invalid character found in the request target [/epadd/export-headers?archiveID=1bd1034dd155e0a65266b39b9d06bf10e0f4f638c3b8cfdd73f8c148b9482408&exportType=csv&dir=C:\/Users/XXXXXXX/ ]. The valid characters are defined in RFC 7230 and RFC 3986