Thanks for your response.
Were your annotations altered with any pre- or post-processing? You should avoid any modifications to your annotations if you want to use prodigy train
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That message is a bit too vague for me to diagnose without more details. Was this all of the error message? If not, can you provide the full stack error message?
The closest I found was relating to tokenization:
I'm wondering if this is a tokenization problem because of some pre- or post-processing you may have done.
Alternatively if not, can you provide a small sample of your data like you did previously?
Also, moving forward, please avoid screen shots of code - you can instead copy/paste it directly. This enables it be searchable for the next user (e.g., now others could search by the same error message and find this post)