flashlight: [Error when importing Flashlight] ImportError: libfl-libraries.so.0: undefined symbol: _ZN2lm5ngram6ConfigC1Ev

Question

I want to fine-tune Wav2vec with my own data. I got error when running this command:

python3.7 fairseq/train.py './labelled_manifest' --save-dir './model_finetuning_wav2vec' --wer-args '("./labelled_manifest/lm.bin","./labelled_manifest/lexicon.txt",2,-1)' --post-process letter --valid-subset valid --no-epoch-checkpoints --best-checkpoint-metric wer --num-workers 128 --max-update 400000 --sentence-avg --task audio_pretraining --arch wav2vec_ctc --w2v-path './w2v2_pre_train_model/wav2vec_small.pt' --labels ltr --apply-mask --mask-selection static --mask-other 0 --mask-length 10 --mask-prob 0.5 --layerdrop 0.1 --mask-channel-selection static --mask-channel-other 0 --mask-channel-length 64 --mask-channel-prob 0.5 --zero-infinity --feature-grad-mult 0.0 --freeze-finetune-updates 10000 --validate-after-updates 10000 --optimizer adam --adam-betas '(0.9, 0.98)' --adam-eps 1e-08 --lr 2e-05 --lr-scheduler tri_stage --warmup-steps 8000 --hold-steps 32000 --decay-steps 40000 --final-lr-scale 0.05 --final-dropout 0.0 --dropout 0.0 --activation-dropout 0.1 --criterion ctc --attention-dropout 0.0 --max-tokens 1280000 --seed 2337 --log-format json --log-interval 500 --ddp-backend no_c10d

The error is the following: NameError: name 'CriterionType' is not defined

I have successfully installed flashlight according to these steps.

I know that an issue has been opened with same error #468 but it doesn’t fix my problem.

Additional Context

Im on Ubuntu 18.04 python 3.7.4 Cuda 11.2