Xamarin Forms IOS Entry is uneditable

I am using Xamarin.Forms to build my app. In the Login Page, I have the following layout

    <StackLayout>
                <StackLayout.Padding>
                    <OnPlatform x:TypeArguments="Thickness" Android="32,0" iOS="32,0" WinPhone="32,0"/>
                </StackLayout.Padding>
                <StackLayout.Spacing>
                    <OnPlatform x:TypeArguments="x:Double" Android="0" iOS="15" WinPhone="10"/>
                </StackLayout.Spacing>
                <toolkit:EntryLine
                   Text="{Binding Email}"
                   Keyboard="Email"
                   HorizontalOptions="FillAndExpand"
                   Placeholder="Email Address"
                   x:Name="EntryEmail"
                   StyleId="EmailTextField"
                   BorderColor="#ECECEC">
                    <toolkit:EntryLine.HorizontalTextAlignment>
                        <OnPlatform x:TypeArguments="TextAlignment" iOS="Center"/>
                    </toolkit:EntryLine.HorizontalTextAlignment>
                </toolkit:EntryLine>
    <toolkit:EntryLine
                   Text="{Binding Password}"
                   HorizontalOptions="FillAndExpand"
                   HorizontalTextAlignment="Center"
                   Placeholder="Password"
                   Keyboard="Text"
                   BorderColor="#ECECEC">
                    <toolkit:EntryLine.HorizontalTextAlignment>
                        <OnPlatform x:TypeArguments="TextAlignment" iOS="Center"/>
                    </toolkit:EntryLine.HorizontalTextAlignment>
                </toolkit:EntryLine>
            </StackLayout>

When run on Android Emulator I can input text in "EntryLine" and everything seems to work fine.
However, when I am trying to run it on IOS simulator, the text becomes ineditable i.e. readonly. Basically on IOS simulator everything inside StackLayout is becoming "ReadOnly"
I also tried using forms "Entry" instead of FormsToolKit.EntryLine, but no result.
Using -
Visual Studio 2017,
Windows Platform,
Xamarin - 2.3.4.247
FormsToolKit - 1.1.18
IOS - MacBook Air 10.3