I got a similar error compiling a contract. In my case I found deps.js looks for contract.wasm but
secret_contracts/{CONTRACT_NAME}/target/wasm32-unknown-unknown/release/contract.wasm
was named
secret_contracts/{CONTRACT_NAME}/target/wasm32-unknown-unknown/release/{CONTRACT_NAME}.wasm
fixed by manually renaming to contract.wasm and recompiling. Maybe this isn’t the right solution but it compiled … happens if you don’t change the name in Cargo.toml file