score:1

Accepted answer

This is not a full answer but only a demonstration of your code and a suggestion. Your code looks fine (see example below).
There is a similar issue like you are facing.
One folk wrote:

My problem is caused by npm link. I have 2 libs(A and B) which are both depends on react-bootstrap. B depends on v0.28.3, A depends on v0.29.0. And B depends on A through npm link. It's weird that codes of A will use the packages under B's node_modules. Anyway, update B's package.json to use v0.29.0 solve the issue.

Anyway here is your code running fine:

const { Form, FormGroup, Col, FormControl, Checkbox, ControlLabel, Button } = ReactBootstrap;
class LoginForm extends React.Component {
  render() {
    return (
      <div class="row content">
        <Form horizontal>
          <FormGroup controlId="formHorizontalEmail">
            <Col componentClass={ControlLabel} sm={2}>
              Email
                  </Col>
            <Col sm={10}>
              <FormControl type="email" placeholder="Email" />
            </Col>
          </FormGroup>

          <FormGroup controlId="formHorizontalPassword">
            <Col componentClass={ControlLabel} sm={2}>
              Password
                  </Col>
            <Col sm={10}>
              <FormControl type="password" placeholder="Password" />
            </Col>
          </FormGroup>

          <FormGroup>
            <Col smOffset={2} sm={10}>
              <Checkbox>Remember me</Checkbox>
            </Col>
          </FormGroup>

          <FormGroup>
            <Col smOffset={2} sm={10}>
              <Button type="submit">
                Sign in
                    </Button>
            </Col>
          </FormGroup>
        </Form>
      </div>
    );
  }

}

ReactDOM.render(<LoginForm />, document.getElementById("root"));
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-bootstrap/0.31.3/react-bootstrap.min.js"></script>
<div id="root"></div>

score:0

If error is related to proptype then you may need to import the prop-types ..

    import React from 'react'; 
    import PropTypes from 'prop-types'

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