Additionally, if this is the first time you're running zec-qt-wallet or a zcashd daemon, zec-qt-wallet will download the zcash params (~1.7 GB) and configure `zcash.conf` for you.
zec-qt-wallet is written in C++ 14, and can be compiled with g++/clang++/visual c++. It also depends on Qt5, which you can get from here: https://www.qt.io/download
Normally, zec-qt-wallet can pick up the rpcuser/rpcpassword from zcash.conf. If it doesn't for some reason, you can set the username/password in the File->Settings menu.
If you are connecting to a remote node, make sure that zcashd on the remote machine is accepting connections from your machine. The target machine's firewall needs to allow connections
from your host and also zcashd is set to be configured to accept connections from this host.
The easiest way to connect to a remote node is probably to ssh to it with port forwarding like this:
The most likely cause for this is that you are trying to spend unconfirmed funds. Unlike Bitcoin, the Zcash protocol doesn't let you spent unconfirmed funds yet. Please wait for