That doesn't sound like an SSIS error, but an error in your script or possibly from one of your FTP servers. You would have to debug your script to see why you are getting that message.
SSIS Script task - FTP password not allowed
Pan Jim
1
Reputation point
I have a SQL agent jobs that got error on FTP Password not allowed. This job has 13 steps and they are all have the same script for FTP. DTSX package does not have any FTP connection defined. It is all dynamically build using the C# Scripts. I am not sure why certain DTSX package failed, 10 dtsx ran good. I am out of idea what to check. Please help,