ns not found internal server error

[chavda-bhavik]

Describe the bug
While clicking on the Upload Again button from the second mapping stage, the API doesn't work and throws the error ns not found internally.

To Reproduce
Steps to reproduce the behavior:

1. Create a new import and add a few columns.
2. Click on the Import button.
3. Upload Excel or CSV file.
4. Click on See Mapping
5. On the second stage click on the Upload Again button, it will not work.

Expected behavior
The Upload Again button should work without any respect of where the user is.

Screenshots
Error backend API is throwing,

Desktop (please complete the following information):

• Version 0.18.0

Additional context
As per the research, the error is occurring due to MongoDB collection not being found. So in terminate API, we can add a check if the Mongodb collection exists then and then only try to delete it.

[HarjobandeepSingh]

@chavda-bhavik issue might be due to the MongoDB collection not being created yet or the name of the collection being incorrect.