Javascripts error in alert page Cannot create property 'type' on string ''

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1

Hi,
We have JS error in alert page.
The visual tab is blank.

BT5zpi.png1573×937 43.3 KB

I updated all plugins and theme.
Gravity forms version: 2.4.8
Wordpress version: 5.1.1

theme.min.js?wp-mce-4920-20181217:1 Uncaught TypeError: Cannot create property ‘type’ on string ‘’
at Array. (theme.min.js?wp-mce-4920-20181217:1)
at Object.Ht [as each] (tinymce.min.js?ver=4920-20181217:2)
at A (theme.min.js?wp-mce-4920-20181217:1)
at Array. (theme.min.js?wp-mce-4920-20181217:1)
at Object.Ht [as each] (tinymce.min.js?ver=4920-20181217:2)
at L (theme.min.js?wp-mce-4920-20181217:1)
at ye (theme.min.js?wp-mce-4920-20181217:1)
at Mt (theme.min.js?wp-mce-4920-20181217:1)
at Object.renderUI (theme.min.js?wp-mce-4920-20181217:1)
at tw (tinymce.min.js?ver=4920-20181217:2)

2

I recommend opening a support ticket for this.

https://www.gravityforms.com/open-support-ticket/