Hello, Thank you for reporting, I have fixed it, just download the new zip file and it will work! :D
Viewing post in Retro Plains 16x16 Tileset - Kingdom Explorer comments
Hey, so I've been posting about this here: https://forums.rpgmakerweb.com/index.php?threads/my-newly-purchased-tileset-is-n... and according to them, you didn't finish fixing it. Some of it is still wrong. Please fix it.
Hello, I tested it again right now, there was a simple fix on the water auto tile to do, It's working now!
Remember to download the zip again, replace the files on the tilesets folder and on RPG Maker > Settings > Tilesets to replace the sprites with the new ones, sometimes RPG Maker doesn't update it right away.
Thanks for reporting it and have fun!