Can't edit Xamarin .axml layout files with Visual Studio 2015

Due to a version license restriction at work, I have to develop a Xamarin Android app using Visual Studio 2015. I must say that using Visual Studio 2019 (Student version) on my personal computer everything works fine, but I can't develop with that license at work.

On my work computer, I have installed and updated the Xamarin for Visual Studio 2015 extension, and using Java Runtime Environment v1.8.0_241 and Java Development Kit v1.8.0_231, as I read at so many guides, here my config:

I have created and empty Xamarin Android Project, with no more files than the empty project includes, and there is no code modified by my side. But I get this error when trying to open the .axml file.

"Connection to the layout renderer failed. This may be caused by a misconfiguration of Java."

Here the full error report:

java.lang.NoClassDefFoundError: com/android/utils/ILogger
	at java.lang.Class.getDeclaredMethods0(Native Method)
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
	at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
	at java.lang.Class.getMethod0(Class.java:3018)
	at java.lang.Class.getMethod(Class.java:1784)
	at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: com.android.utils.ILogger
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	... 7 more
Error: A JNI error has occurred, please check your installation and try again
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=350m; support was removed in 8.0
Picked up _JAVA_OPTIONS: -XX:MaxPermSize=256m
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
Exception in thread "main" 

Last line about "ignoring option MaxPermSize=256m" is due to a environment variable I created following guides, but now I have run out of options :/

I'm questioning if it is even possible to develop with Xamarin using Visual Studio 2015 or I have to ask my boss to upgrade license.

I appreciate any support. Thanks.

The only solution I have encountered as far:

I'm editing the .xml files (the UI designs) using Android Studio, then copy the code to the .axml in Visual Studio 2015, and now it works. My application is very simple, I only have Button, TextView and EditText, and it is enought for me.

If you have a more scalable solution, avoiding to use an external tool (Android Studio) my vote is yours.