If you're using the LiveCycle turnkey it's running as a system account and likely doesn't have access to the share. The account that the service runs under has to have rights to the share.
Thank you. Issue resolved using account with sufficient rights.
I get the same issue as original poster, but for me, everything was working for months and this morning, I get that error message. What can I check for then if I haven't changed any settings?
I did check the path as well in windows explorer and it connects fine. I do have and account in place for security. What am I missing?