@skandha thanks so much for the detailed steps you suggested – I had the same problem as original poster, with catch gallery/tiles mosaic not working. Seems the only way to get to it is to go through the classic block, upload media, and only through there can you find add gallery and the tile options. Question I have is once we’ve created through there, is there a way we can edit/add to the gallery? So far only work around I’ve found is deleting and re-uploading. Is there any way you know of to edit it? Thanks in advance for your help.