Unable to find detailed instructions for using...

I've been trying to look up some detailed instructions about using Tabs & Accordions on your website, but the menu down the side that used to be there has disappeared. I've tried on a computer and an Android tablet. The menu flashed up on the computer for a split second and then disappeared. I know the detailed instructions are there because I've used them in the past.

Please investigate!

That's the page I started from, and it only links to two other pages:

docs4.regularlabs.com/tabsaccordions/get...started/installation

and

docs4.regularlabs.com/tabsaccordions/get...m-joomla3-to-joomla4

The only link on the Upgrading page goes back to Installation. No links to any other instructions. I've tried on a Windows computer and an Android tablet and phone. The menu that used to be there just flashes up for a split second (only lsometimes) and disappears.

Hi Peter,
Sorry about the delay in replying - rather busy.
Yes, it must be something to do with my Firefox settings, possibly an ad blocker. I switched to Edge and the sidebar reappeared. Also, I tried with firefox on my wife's computer and the sidebar showed up.
Keep up the good work, excellent products!
Basil