i am following the tutorial how to create a simple map. However, I got stuck in the step to upload the data. It gives me an error and I dont know why (see photo). I zipped the shapefile with all the respective other files and uploaded it. Doesnt work. This is why I also added a Spatial Reference. The data is WGS84 --> EPSG:4326.
I just downloaded and installed Opengeo Suite. So its the latest version. I have Windows 7, 32 bit on my PC.