Swift Package Manager with resources compile errors

I am trying to use resources inside my Package.swift file:

// swift-tools-version:5.3
// The swift-tools-version declares the minimum version of Swift required to build this package.

import PackageDescription

let package = Package(
    name: "MyPackage",
    products: [
        .library(
            name: "MyPackage",
            targets: ["MyPackage"])
    ],
     targets: [
        .target(
            name: "MyPackage",
            resources: [
               .process("Resources/one.xml"),
               .process("Resources/two.json"),
               .process("Resources/three.json"),
             ]
        )
        .testTarget(
            name: "MyPackageTests",
            dependencies: ["MyPackage"]
        )
    ]
)

When I import and compile the package in another project, I am getting lots of errors, such as:

Cannot infer contextual base in reference to member 'target'

or:

Reference to member 'process' cannot be resolved without a contextual type

The files are located in my package project in Sources -> MyPackage -> Resources

I also tried .copy("Resources/one.xml"), etc

What am I missing?

You missed a , after the target close parentheses:

        .target(
            name: "BioSwift",
            resources: [
               .process("Resources/unimod.xml"),
               .process("Resources/aminoacids.json"),
               .process("Resources/elements.json"),
               .process("Resources/enzymes.json"),
               .process("Resources/functionalgroups.json"),
               .process("Resources/hydropathy.json")
            ]
        ), // Here is the missed `,`

Also, you don't need to add files one by one! Instead, you can add a directory:

.process("Resources")