Hello @siya1234
As said by @Dillon Silzer , first check if the file is encrypted and has a password, if yes then remove it and then place it again on SFTP
Currently, ADF will not support decrypting a password protected file, but if that is your requirement, you will either have to use a different component like Azure Function
You can find more details in a similar type of question here
and upvote
for the same. And, if you have any further query do let us know.