Can't translate video source (WPML / Stackable Gutenberg blocks)
Solution:
Please the following code to WPML-> Settings-> Custom XML Tab
<wpml-config>
<gutenberg-blocks>
<gutenberg-block type="stackable/video-popup" translate="1">
<key name="videoLink"></key>
<xpath type="link">//div/@data-video</xpath>
</gutenberg-block>
</gutenberg-blocks>
</wpml-config>
After that, update the page in the default language and its translation.
<strong>Relevant Documentation:</strong>
https://wpml.org/documentation/support/language-configuration-files/
