Okay, so my previous issue has been mostly resolved, but now I'm having an issue with tilemaps. So I create my tilemap, create a new tileset for it, add my tile images, and I go to select them and start painting (after adding a tilemap layer), but I can't. Like I literally can't select or place any of my tiles. I tried restarting Godot, remaking the Tilemap, reimporting the images...nothing seems to work though.
I did get some errors in Output, so if anyone can help me it would be appreciated.

Errors:
The Image width specified (0 pixels) must be greater than 0 pixels.
Invalid image: image is empty
editor/plugins/tiles/tile_set_atlas_source_editor.cpp:1479 - Condition "start_base_tiles_coords == TileSetSource::INVALID_ATLAS_COORDS" is true.

I don't really know what these mean, or how I would go about fixing them, but I'm pretty sure once I do my issue will be resolved.