CorneliaCycling

Yes, me too – I installed this wonderful plugin today, tested it with one of my sidebars, changed the configuration and played around … when it had the perfect look I wanted to insert the widget in my other sidebars, but it wasn’t possible!
I had to deactivate the plugin and am looking for another solution now. However, I’d be glad to use this one any time.
Thanks for the great work anyway. It’s an awesome plugin.

I’m not a wordpress developer. However, I just tried Polymetis’ solution. I just took the php file that was referenced in the warnings and replaced the line at (or close to) the line 108. It helped to suppress all error messages but one (referencing line 135). This one didn’t look like it needed a replacement, but I’m not sure because I don’t really know what I’m doing. Maybe it’ll help other users if you could specify where exactly to replace the code and what piece of code to replace?

Great plugin though, really liked it.