I can't export a file?

I am trying to clip some videos then render them and save them. When I hit export it brings up the folders and places I can save it but at the bottom for “save as type” I cannot choose anything. I really need these videos done and I could really use the help!
Thank you anyone for helping me!

There is no ‘Save as type’ for the Shotcut export. The type [format] is chosen from the Export panel before you press the Export button. Simply enter the export name with the export format extension. eg: MyVideo.mp4