Cannot assign an empty string to a string offset problem

I have the same problem as the other person posted where you closed the thread. I had to roll all the way back to a very old php version on my server (5.6) to finally get your pricing table to work again. Otherwise I get row after row of the “cannot assign an empty string…” error. Why is this plug-in not compatible with the latest version of WordPress and advanced pho from 7.2 onward? That’s the default now with most hosting companies.

The page I need help with: [log in to see the link]