Hello,
I have checked your tabs and don’t see the issue with the horizontal scroll of tabs titles https://gyazo.com/6e0746f73b648c1388115bc5d94b6cc8 Could you explain in more details?
This option https://prnt.sc/t01ii1 enables the scroll for the content of the tabs http://prntscr.com/t1lloz , not for the titles.
Regards