Error using corpus widget in Orange v 3.25.0 text mining and no import document option?

I am experimenting with Orange data mining tool. When I use the ‘Corpus’ widget from the text mining section it gives me the error: [![Corpus widget error][1]][1]

I have tried many things, but am still unable to resolve this issue.
[1]: https://i.stack.imgur.com/X4tKu.png

Besides that, in text mining, it does not show import document option in orange v 3.25. I just want to know the options to import text files into the Orange.