How can I upload a public key of SFTP server into BTP CPI.

[Nijith]

I need upload a public key of an SFTP server into SAP BTP CPI  to read a file .But always getting an error "cannot load key".

Steps followed :
1. Created a new file called test_key.pub and copy pasted the public received.
2. Navigate to BTP CPI->Security Materials -> Manage Keystore ->Add -> SSH key.
3. Entered the Region,Alias,Common name etc.