Hi,
The problem is the incompatibility between the different plugins when you generates the native application. The InAppBrowser plugin compiles successfully in an isolated way when you use MABS 7.0 (must be the latest version (2.4.0 or later) to be supported correctly in MABS 7.0). This plugin needs Swift support but MABS 7.0 gives it this support. If you test only with this plugin you shouldn't have any problem in order to compile an IOS version.
On the other hand, I can see in your logs that you added the SwiftSupportPlugin. I have tested InAppBrowser and SwiftSupportPlugin together and not compile. I don't know if you'll need this plugin for other plugins but I'd suggest you to remove it (MABS supports Swift 5.3) and try to compile.
If it doesn't work you will have to remove plugins until it compiles. It is also important to check the versions of the plugins.
Kind regards, David.