Python 3.12.3 torch==2.10.0 transformers=5.3.0

My aim is to load the tokenizer(s) for Helsinki-NLP/opus-mt-ru-en and Helsinki-NLP/opus-mt-zh-en, which I’ve been able to do for a couple years until I upgraded to Ubuntu 24, hence Python 3.12.

Do I need to downgrade to an older version of transformers?

Running with the example code from the Model Card I get the exception that is frustrating me:

Load model directly

from transformers import AutoTokenizer, AutoModelForSeq2SeqLM tokenizer = AutoTokenizer.from_pretrained(“Helsinki-NLP/opus-mt-ru-en”) model = AutoModelForSeq2SeqLM.from_pretrained(“Helsinki-NLP/opus-mt-ru-en”) Traceback (most recent call last): File “/usr/local/lib/python3.12/dist-packages/IPython/core/interactiveshell.py”, line 3747, in run_code exec(code_obj, self.user_global_ns, self.user_ns) File “”, line 4, in tokenizer = AutoTokenizer.from_pretrained(“Helsinki-NLP/opus-mt-ru-en”) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File “/usr/local/lib/python3.12/dist-packages/transformers/models/auto/tokenization_auto.py”, line 789, in from_pretrained raise ValueError( ValueError: Unrecognized configuration class <class ‘transformers.models.marian.configuration_marian.MarianConfig’> to build an AutoTokenizer. Model type should be one of Aimv2Config, AlbertConfig, AlignConfig, AudioFlamingo3Config, AyaVisionConfig, BarkConfig, BartConfig, BertConfig, BertGenerationConfig, BigBirdConfig, BigBirdPegasusConfig, BioGptConfig, BlenderbotConfig, BlenderbotSmallConfig, BlipConfig, Blip2Config, BridgeTowerConfig, BrosConfig, CamembertConfig, CanineConfig, ChineseCLIPConfig, ClapConfig, CLIPConfig, CLIPSegConfig, ClvpConfig, LlamaConfig, CodeGenConfig, CohereConfig, Cohere2Config, ColQwen2Config, ConvBertConfig, CpmAntConfig, CTRLConfig, Data2VecAudioConfig, Data2VecTextConfig, DbrxConfig, DebertaConfig, DebertaV2Config, DeepseekVLConfig, DeepseekVLHybridConfig, DiaConfig, DistilBertConfig, DPRConfig, ElectraConfig, Emu3Config, ErnieConfig, EsmConfig, FalconMambaConfig, FastSpeech2ConformerConfig, FlaubertConfig, FlavaConfig, FlexOlmoConfig, Florence2Config, FNetConfig, FSMTConfig, FunnelConfig, FuyuConfig, GemmaConfig, Gemma2Config, Gemma3Config, Gemma3TextConfig, Gemma3nConfig, Gemma3nTextConfig, GitConfig, GlmConfig, Glm4Config, Glm4MoeConfig, Glm4MoeLiteConfig, Glm4vConfig, Glm4vMoeConfig, GlmImageConfig, GlmAsrConfig, GotOcr2Config, GPT2Config, GPT2Config, GPTBigCodeConfig, GPTNeoConfig, GPTNeoXConfig, GPTNeoXJapaneseConfig, GPTJConfig, GraniteConfig, GraniteMoeConfig, GraniteMoeHybridConfig, GraniteMoeSharedConfig, GroundingDinoConfig, GroupViTConfig, HubertConfig, IBertConfig, IdeficsConfig, Idefics2Config, InstructBlipConfig, InstructBlipVideoConfig, InternVLConfig, Jais2Config, JambaConfig, JanusConfig, Kosmos2Config, LasrCTCConfig, LasrEncoderConfig, LayoutLMConfig, LayoutLMv2Config, LayoutLMv3Config, LayoutXLMConfig, LEDConfig, LightOnOcrConfig, LiltConfig, LlavaConfig, LlavaNextConfig, LongformerConfig, LukeConfig, LxmertConfig, M2M100Config, MambaConfig, Mamba2Config, MarianConfig, MarkupLMConfig, MBartConfig, MegatronBertConfig, MetaClip2Config, MgpstrConfig, MinistralConfig, Ministral3Config, MistralConfig, Mistral3Config, MixtralConfig, MMGroundingDinoConfig, MobileBertConfig, MPNetConfig, MptConfig, MraConfig, MT5Config, MusicgenConfig, MusicgenMelodyConfig, MvpConfig, NllbMoeConfig, VisionEncoderDecoderConfig, NystromformerConfig, OlmoConfig, Olmo2Config, Olmo3Config, OlmoHybridConfig, OlmoeConfig, OmDetTurboConfig, OneFormerConfig, OpenAIGPTConfig, OPTConfig, Ovis2Config, Owlv2Config, OwlViTConfig, PegasusConfig, PegasusXConfig, PerceiverConfig, PhiConfig, Phi3Config, Pix2StructConfig, PixtralVisionConfig, PLBartConfig, ProphetNetConfig, Qwen2Config, Qwen2_5OmniConfig, Qwen2_5_VLConfig, Qwen2AudioConfig, Qwen2MoeConfig, Qwen2VLConfig, Qwen3Config, Qwen3_5Config, Qwen3_5MoeConfig, Qwen3MoeConfig, Qwen3NextConfig, Qwen3OmniMoeConfig, Qwen3VLConfig, Qwen3VLMoeConfig, RagConfig, RecurrentGemmaConfig, ReformerConfig, RemBertConfig, RobertaConfig, RobertaPreLayerNormConfig, RoCBertConfig, RoFormerConfig, RwkvConfig, Sam3Config, Sam3VideoConfig, SeamlessM4TConfig, SeamlessM4Tv2Config, ShieldGemma2Config, SiglipConfig, Siglip2Config, Speech2TextConfig, SpeechT5Config, SplinterConfig, SqueezeBertConfig, StableLmConfig, Starcoder2Config, SwitchTransformersConfig, T5Config, T5GemmaConfig, TapasConfig, TrOCRConfig, TvpConfig, UdopConfig, UMT5Config, UniSpeechConfig, UniSpeechSatConfig, ViltConfig, VipLlavaConfig, VisualBertConfig, VitsConfig, VoxtralConfig, VoxtralRealtimeConfig, Wav2Vec2Config, Wav2Vec2BertConfig, Wav2Vec2ConformerConfig, WhisperConfig, XCLIPConfig, XGLMConfig, XLMConfig, XLMRobertaConfig, XLMRobertaXLConfig, XLNetConfig, xLSTMConfig, XmodConfig, YosoConfig.