I have been working, daily, on pages that were built in JABuilder (some years ago). Everything has been working and updating just fine until about 3:30 a.m. this morning (Pacific time/US). Then, suddenly, when I went to open a page to edit I just got a white/blank page. I tested this on all my browsers (FF. Chrome, Safari, Maxthon and Edge). Same thing happens on each browser. Also, I had my partner try it on his computer and he gets he same thing on all his browsers... just a white/blank page.
We have MULTIPLE events going on right now and I need to update these pages constantly. But, I can't now.
Background: I did have to update the site's extensions last night in order to use a template on Smart Slider 3. I was able to auto update 16 extensions and things still worked after this. It was about 2-3 hours after the extension updates that the JABuilder pages started to come up white/blank. FWIW, I'm still on Joomla 3. I did't want to move until I have to. But the plan is to update to 4 at the end of this month.
If you can offer an advice as to what I should look at to fix this, I'd appreciate it!