Hi @gillesderon,
Unfortunately, these two web browsers are not supported by our item anymore.
Furthermore the utility CSS classes that you’re mentioning in your previous reply are generated by the latest version Bootstrap, which allow me to conclude also that the authors might not support these browsers anymore also.
In any case, we really thank you for sharing your solution with the rest of the forum as it might help those who will face the same issue. #SharingIsCaring ?
Cheers,