My custom module stopped loading ui_component based admin form of Magento 2.3.1, because of <htmlContent name="gallery">
, however it was working fine in Magento 2.3.0. No logs or reports found to follow the problem, only blank page.
Here is the code, which i remove and form load,
<htmlContent name="gallery" sortOrder="22">
<argument name="data" xsi:type="array">
<item name="wrapper" xsi:type="array">
<item name="label" xsi:type="string" translate="true">Images</item>
<item name="collapsible" xsi:type="boolean">true</item>
<item name="opened" xsi:type="boolean">false</item>
</item>
</argument>
<settings>
<wrapper>
<canShow>true</canShow>
<componentType>fieldset</componentType>
</wrapper>
</settings>
<block name="gallery" class="Magento\Catalog\Block\Adminhtml\Product\Helper\Form\Gallery">
<block class="ABC\Categorybanner\Block\Adminhtml\Categorybanner\Edit\Tab\Images" as="content">
<arguments>
<argument name="config" xsi:type="array">
<item name="parentComponent" xsi:type="string">categorybanner_index_form.categorybanner_index_form.block_gallery.block_gallery</item>
</argument>
</arguments>
</block>
</block>
</htmlContent>