For the Instagram, it seems they have been updating their share data structure. Please try to replace the content of this file below:
1. wp-content/themes/jnews/class/Widget/Normal/Element/InstagramWidget.php with this one https://pastebin.com/JJhZwUxU
2. wp-content/plugins/jnews-instagram/class.jnews-instagram.php with this one https://pastebin.com/2FXXT6PA
Let me know if it’s work or not on your side.