"Wide character in print at ../web-lib-funcs.pl line 7482" error in backup.pl

When running backups via cron virtualmin shows the error on some backups:
Wide character in print at ../web-lib-funcs.pl line 7482.
In this string file have the function:
sub print_tempfile
{
my ($fh, @args) = @_;
$fh = &callers_package($fh);
(print $fh @args) || &error(&text("efilewrite",
$main::open_temphandles{$fh} || $fh, $!));
}

cron commands:
/etc/webmin/virtual-server/backup.pl --id 122113260411099
/etc/webmin/virtual-server/backup.pl --id 12211291835541

Webmin & Virtualmin are latest versions.