We can confirm it is the same issue faced here: https://discuss.nubits.com/t/passed-motion-to-provide-seed-funding-for-b-c-exchange-a-decentralized-exchange-built-on-the-peershares-platform/2001/483. The client doesn't support spaces in the path or the password.

We will be issuing a quick fix release in the next day or two to ensure that you will be able to import your NuShares wallet without trouble.