Build Error

I’m trying to build my app but this error message keeps popping up. The weird thing is I did a build earlier today, made some adjustments (like editing UI, adding in animations, changing some code) and now it isn’t working. So I’m not sure what has changed between then and now, but it’s very much doing my head in.

I have already tried reimporting all my assets and looking through my folders for any plugins, but not sure there’s anything different from before.
Have even tried saving in a different location and also the old classic closing unity and opening it up again. No luck.

Any thoughts?

.

UnityEditor.BuildPlayerWindow+BuildMethodException: 3 errors
at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (UnityEditor.BuildPlayerOptions options) [0x0021f] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:187
at UnityEditor.BuildPlayerWindow.CallBuildMethods (System.Boolean askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions) [0x0007f] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:94
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

Where do I find out what version of editor I’m using?
Is it the same as unity version? Like 2018.2.8f1 (Sorry, I’m a bit new to all this)

@nratcliff