AUTOLOAD Issues while with several Tk subroutines (grab_set, wait_window, update_idletasks....)

[Digioso]

I'm using StrawberryPerl 5.40.0.1-64bit on Windows 11 and have installed Tk using these instructions: StrawberryPerl/Perl-Dist-Strawberry#87 (comment)
I uninstalled StrawberryPerl completely and did a fresh install. The issue persisted.
I noticed this with grab_set, update_idletasks & wait_window so far. I believe there was one more, but can't remember.
Using grab instead of grab_set works.

First thing: I'm from Germany and use a German locale. Tk however doesn't seem to be compatible with non-English locale, so maybe the issues come from there.
This has already been mentioned here: #107 (comment)
And also in the posting I linked above.

Workaround is to set LC_ALL & LANG to C. With this it installed successfully.

C:\>set LC_ALL=C

C:\>set LANG=C

C:\>cpanm https://github.com/StrawberryPerl/Perl-Dist-Strawberry/releases/download/patched_cpan_modules/Tk-804.036_001.tar.gz
--> Working on https://github.com/StrawberryPerl/Perl-Dist-Strawberry/releases/download/patched_cpan_modules/Tk-804.036_001.tar.gz
Fetching https://github.com/StrawberryPerl/Perl-Dist-Strawberry/releases/download/patched_cpan_modules/Tk-804.036_001.tar.gz ... OK
Configuring Tk-804.036001 ... OK
Building and testing Tk-804.036001 ... OK
Successfully installed Tk-804.036001
1 distribution installed

C:\>

Example code:

#!/usr/bin/perl -w
use strict;
use warnings;
use utf8;
use POSIX qw(setlocale LC_ALL);
use POSIX;
use Tk;
use feature ('say', 'signatures');

my $mw = MainWindow->new;
$mw->title("Title");
$mw->geometry("800x600");
my $btn_frame = $mw->Frame()->pack(-side => 'right', -fill => 'y');
$btn_frame->Button(-text => 'button-text', -command => \&sub_function)->pack(-fill => 'x');

MainLoop();
exit 0;

sub sub_function
{
    my $pre_dialog = $mw->Toplevel();
	focus_dialog($pre_dialog, "sub text", $mw);
	print "...\n";
}

sub focus_dialog
{
	my ($window_widget, $window_title, $parent_widget) = @_;

    unless (eval { $window_widget->isa('Tk::Widget') } && eval { $parent_widget->isa('Tk::Widget') }) {
        warn "focus_dialog: Ungültige Widget-Argumente erhalten!";
        return;
    }

    $window_widget->title($window_title);
    $window_widget->transient($parent_widget);

    #$window_widget->update_idletasks;


    $window_widget->grab_set();

    $window_widget->focusForce;
}

Example errors:

R:\Pen & Paper\Uniworld\Uniworld Charakter Manager>test.pl
Tk::Error: Failed to AUTOLOAD 'Tk::Toplevel::grab_set' at R:\Pen & Paper\Uniworld\Uniworld Charakter Manager\test.pl line 41.
 Tk callback for .toplevel
 Carp::croak at C:/Strawberry/perl/lib/Carp.pm line 291
 Tk::Widget::__ANON__ at C:/Strawberry/perl/site/lib/Tk/Widget.pm line 347
 main::focus_dialog at R:\Pen & Paper\Uniworld\Uniworld Charakter Manager\test.pl line 41
 main::sub_function at R:\Pen & Paper\Uniworld\Uniworld Charakter Manager\test.pl line 22
 Tk callback for .frame.button
 Tk::__ANON__ at C:/Strawberry/perl/site/lib/Tk.pm line 251
 Tk::Button::butUp at C:/Strawberry/perl/site/lib/Tk/Button.pm line 175
 <ButtonRelease-1>
 (command bound to event)

Tk::Error: Failed to AUTOLOAD 'Tk::Toplevel::update_idletasks' at R:\Pen & Paper\Uniworld\Uniworld Charakter Manager\test.pl line 38.
 Tk callback for .toplevel
 Carp::croak at C:/Strawberry/perl/lib/Carp.pm line 291
 Tk::Widget::__ANON__ at C:/Strawberry/perl/site/lib/Tk/Widget.pm line 347
 main::focus_dialog at R:\Pen & Paper\Uniworld\Uniworld Charakter Manager\test.pl line 38
 main::sub_function at R:\Pen & Paper\Uniworld\Uniworld Charakter Manager\test.pl line 22
 Tk callback for .frame.button
 Tk::__ANON__ at C:/Strawberry/perl/site/lib/Tk.pm line 251
 Tk::Button::butUp at C:/Strawberry/perl/site/lib/Tk/Button.pm line 175
 <ButtonRelease-1>
 (command bound to event)

Tk::Error: Failed to AUTOLOAD 'Tk::Toplevel::wait_window' at R:\Pen & Paper\Uniworld\Uniworld Charakter Manager\test.pl line 38.
 Tk callback for .toplevel
 Carp::croak at C:/Strawberry/perl/lib/Carp.pm line 291
 Tk::Widget::__ANON__ at C:/Strawberry/perl/site/lib/Tk/Widget.pm line 347
 main::focus_dialog at R:\Pen & Paper\Uniworld\Uniworld Charakter Manager\test.pl line 38
 main::sub_function at R:\Pen & Paper\Uniworld\Uniworld Charakter Manager\test.pl line 22
 Tk callback for .frame.button
 Tk::__ANON__ at C:/Strawberry/perl/site/lib/Tk.pm line 251
 Tk::Button::butUp at C:/Strawberry/perl/site/lib/Tk/Button.pm line 175
 <ButtonRelease-1>
 (command bound to event)

[eserte]

I don't think Perl/Tk has a grab_set method. Methods are usually in camel case. So it would just be grab.