Hi, every time I start Forge, I get the following and it won't let me start: ImportError: cannot import name 'Undefined' from 'pydantic.fields' (H:\Forge UI:\stable-diffusion-webui-forgevenv\libsite-packages\pydantic\fields.py). Press a key to continue . . . Forge does not start

[Languedok]

Hi, every time I start Forge, I get the following and it won't let me start:

ImportError: cannot import name 'Undefined' from 'pydantic.fields' (H:\Forge UI:\stable-diffusion-webui-forgevenv\libsite-packages\pydantic\fields.py).
Press a key to continue . . .

[Texas-stack]

Hi, go to your stable-diffusion-webui folder, open requirements_versions.txt and add line pydantic==1.10.11

save requirements_versions.txt

Then run webui-user.bat

[josefwerner]

this worked for me!