Plugin stopped working…?

WordPress noob here so please bear with me!

I used the Site Origin Page Builder Version (2.4.21) and Site Origin Widgets Version (1.7.2) to create a website yesterday – however this morning I noticed the page layout tab (when you make a new page or are working on an existing one) had gone missing. I reset my cache and cookies and that didn’t fix it.

I started disabling other plugins and found that if I turned the SO widgets plugin off, I got the tab to appear. However, now I don’t have nay of the widgets necessary to work on my page.

I worked around it for the day and left it alone. Logging back in tonight and now the Page Layout tab has disappeared again.

No amount of removing or disabling tabs will restore it and it’s infuriating! Can anyone help me?