Unable to import mockup which contains datagrid

Mockup with a datagrid unable to load into napkee

<mockup>
<controls>
<control />
<control>
<controlproperties>
<text>Customer%20Account%2C%20Name%2C%20Rep%20Code%2C%20Division%2C%20Receives%20Report%20%3F%20%2C%20Products%20In%20Stock%0A%271%27%2C%27Welton%20Bibby%20%26%20Baron%20Ltd%27%2C%27ZY%27%2C%27501%27%2C%3Cnull%3E%2C1</text>
</controlproperties>
</control>
<control>
<controlproperties>
<text>Your%20Customers</text>
</controlproperties>
</control>
</controls>
</mockup>