Editing layout displays blank grey page with no regions

I am using Xibo 1.7.9.

I have been using a existing layout for long time, today I added a text content and clicked on save. Now when I click design to edit this layout the page displays blank grey page with no regions. Preview this layout from the Layouts list shows only the background without any text/content/regions. The second layout (ID 124) is fine thoough).

screenshot below:

Any help would be much appreciated, thank you

I would first recommend upgrading your CMS to the Latest version (1.8.11) to see if this resolves the issue.

If the issue persists after the upgrade, please let em know and I will look into this further.

Many Thanks.