[Bug]: Loading some models on Windows causes PosixPath issues

[alanakbik]

Describe the bug

Some serialized flair models currently cannot be loaded on Windows due to serialized PosixPaths. These models need to be identified and updated for Windows compatibility.

To Reproduce

from flair.data import Sentence
from flair.models import SequenceTagger

model = SequenceTagger.load("pos-multi")

sentence = Sentence("I love Berlin")

model.predict(sentence)

print(sentence)

Expected behavior

All models should run on Windows.

Logs and Stack traces

Screenshots

No response

Additional Context

No response

Environment

Versions:

Flair

0.15.1

Pytorch

2.5.1+cu124

Transformers

4.48.2

GPU

True

[alanakbik]

Issue has been fixed by reserializing the models without the PosixPath.

In the course of fixing this issue, two other models were found to suffer from the same issue: 'ner-ukrainian' and 'pos-ukrainian'. Two PRs have been opened on HF to address this:

• https://huggingface.co/lang-uk/flair-uk-pos/discussions/1
• https://huggingface.co/lang-uk/flair-uk-ner/discussions/1

[alanakbik]

Closed by #3637