WP投稿をDiscourseトピックに移行/変換

ありがとうございます!

Vanilla Forum v3 を Discourse に移行しようとしています。Vanilla porter ですべてを正常にエクスポートできたようですが、インポートスクリプトを実行するとこのエラーが発生します。何か解決策はありますか?

discourse@ip-172-26-0-201-app:/var/www/discourse$ RAILS_ENV=production ruby script/import_scripts/vanilla.rb /shared/uploads/export.txt
Loading existing groups...
Loading existing users...
Loading existing categories...
Loading existing posts...
Loading existing topics...
parsing file...
reading file...
Traceback (most recent call last):
    5: from script/import_scripts/vanilla.rb:260:in `\u003cmain\u003e'
    4: from /var/www/discourse/script/import_scripts/base.rb:47:in `perform'
    3: from script/import_scripts/vanilla.rb:22:in `execute'
    2: from script/import_scripts/vanilla.rb:42:in `parse_file'
    1: from script/import_scripts/vanilla.rb:77:in `read_file'
script/import_scripts/vanilla.rb:77:in `gsub': invalid byte sequence in UTF-8 (ArgumentError)
discourse@ip-172-26-0-201-app:/var/www/discourse$