'Working' on Safari and not on other browsers

[Endy13]

Hi,
after having successfully used Salvatorre on my company website in 2015, I noticed this week that it wasn't working anymore : the tiles are not organized and are displayed as 1 column in full size and the text '3 .column.size-1of3' is displayed before the first tile.

I changed the reference to Savaltorre script to 'https://raw.githubusercontent.com/rnmp/salvattore/master/dist/salvattore.min.js'. (instead of the copy II was hosting elsewhere)

The result :

• Safari : Tiles are correctly displayed and organized, but resizing the window won't work
• Firefox & Chrome : no change

Is there anything obvious I missed ?
Thanks in advance for your help.