F# Quotation Generating very strange compile error
<p>I am trying to work out why the following line:</p>

<pre><code>let emailQuotation: Expr&lt;LoginView -&gt; string&gt; = &lt;@ fun (v: LoginView) -&gt; v.Email.Text @&gt;
</code></pre>

<p>is failing with a compile error, saying "Lookup of object on indeterminate type...". The property <code>ViewModel.Email</code> is a Xamarin Forms <code>Entry</code>, containing a <code>Text</code> property.</p>

<p>What more information does the compiler need, and why is it not able to interpret this expression?</p>