Like I mentioned on the Discord, it sounds like you either have not built it right, you are not running it from the proper directory or the other flags like nosync are causing problems. If you copypasta the build instructions, it should work and start.
git clone https://github.com/adityapk00/zecwallet-light-cli.git
cd zecwallet-light-cli
cargo build --release
./target/release/zecwallet-cli --server https://lwd4.zcash-infra.com:9067
This will start the wallet and youll be able to export the seed and keys
