Bootstrap ElementClassName can't be assigned from component ide property. We must use mannually dfm file to modifiy this.
I cannot see a problem here. What is the exact problem you experience?
2nd point, to have values in ElementClassName I must change ElementFont to efCSS.
But if assigned (in my case from dfm else I can't assign it) I can't change it.
3rd point ['] char in Caption item of TWebAccordion/Sections/Items must be doubled else appli crash.
(DFM won't close string correctly)
I can send my project if you want (1 Mo zipped)
We could reproduce and are investigating.
I send a mail with complete explanation.
We got the email and we are investigating. We will report as soon as we have traced & solved it.