Regrettably, the same error occured again after the latest plugin update.
I have (lol, kind of) come up with a solution. I copied and pasted a few horizontal bars (from the standard Windows table of symbols) and placed them in a row above and below my date field content (as if it is my design choice).
Zakaria’s Timeline block is really good. I am willing to stick with it.
Did you mean he has given up developing it?