Golang: GTK builder does not work with Libadwaita widgets

It seems to be working if only GTK4 widgets are used. If i add libadwaita widgets though the thing builds fine but crashes during runtime. Libadwaita bindings work fine when used without Gtk.Builder

Go code:

package main

import (
    "os"

    _ "embed"

    "github.com/diamondburned/gotk4/pkg/gio/v2"
    "github.com/diamondburned/gotk4/pkg/gtk/v4"
)

//go:embed main.ui
var uiXML string

// Global pointer to appobj
var appobj struct {
    window              *gtk.Window
    welcome_open_button *gtk.Button
    top_stack           *gtk.Stack
    welcome_page        *gtk.StackPage
    main_page           *gtk.StackPage
}

func main() {
    app := gtk.NewApplication("com.aesistril.dictthing", gio.ApplicationDefaultFlags)
    app.ConnectActivate(func() { activate(app) })

    if code := app.Run(os.Args); code > 0 {
        os.Exit(code)
    }
}

func activate(app *gtk.Application) {
    builder := gtk.NewBuilderFromString(uiXML)

    // Initialize global appobj
    appobj.window = builder.GetObject("mainwin").Cast().(*gtk.Window)
    appobj.welcome_open_button = builder.GetObject("welcome_open_button").Cast().(*gtk.Button)
    appobj.top_stack = builder.GetObject("top_stack").Cast().(*gtk.Stack)
    appobj.welcome_page = builder.GetObject("welcome_page").Cast().(*gtk.StackPage)
    appobj.main_page = builder.GetObject("main_page").Cast().(*gtk.StackPage)

    // Set the initial visible child to welcome_page
    appobj.top_stack.SetVisibleChild(appobj.welcome_page.Child())

    // Connect the button to switch pages
    appobj.welcome_open_button.Connect("clicked", func() {
        appobj.top_stack.SetVisibleChild(appobj.main_page.Child())
    })

    // Add the window, casting adw.Window to gtk.Window
    app.AddWindow(appobj.window.Cast().(*gtk.Window))
}

Error:

ERROR failed to add UI: .:17:1 Invalid object type 'AdwToolbarView' priority=3 code_file=../gtk/gtk/gtkbuilder.c code_line=3235 code_func=gtk_builder_new_from_string glib_domain=Gtk
SIGTRAP: trace trap
PC=0x792373dca248 m=0 sigcode=128
signal arrived during cgo execution

And here's the UI definition: https://pastebin.com/hU0SEQws

Edit: nvm solved it. go linter deleted my libadwaita import without asking me