Trouble with Building for mobile,Trouble with Building for Android/IOS

I'm having trouble building for mobile for the first time, I wonder if I'm missing something obvious but I cant find my issue anywhere. I installed the Modules, can go to Android for example in Build Settings and click Build, but when I click the Save button after nothing happens. No errors, just completely unresponsive. This happens for both Android and IOS, yet other builds like WebGL work,I'm having trouble exporting to mobile for the first time, I wonder if I'm missing something obvious but I cant find my issue anywhere. I installed the Modules, can go to Android for example in Build Settings and click Build, but when I click the Save button after nothing happens. No errors, just completely unresponsive. This happens for both Android and IOS, yet other builds like WebGL work