Hello

I have error with plugin PiwigoImportTree while use not english album name.
First use it create album and stop, run again, it create album again alongside with previous album

----------------- error message -----------------
album "Симейные фото / Общие фото / Disk1 / 2003-11-11 ФоÑки Ñ ÑоÑика ÐокÑоÑа" must be created
Wide character in die at piwigo_import_tree.pl line 516.
cannot open file "Симейные фото/Общие фото/Disk1/2003-11-11 ФоÑки Ñ ÑоÑика ÐокÑоÑа/.piwigo_import_tree.txt" for writing at piwigo_import_tree.pl line 515.
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Piwigo 2.6.2
PHP: 5.5.12
MySQL: 5.6.17