AES 128 encryption, cannot be decrypted using key pass by client

I am trying to make an app in which i encrypt a text, turn it into QR, and then the QR is sent to another client, to be decrypted using a Key pass. I am using the AES encrypt & decrypt plugin in which it supports AES encryption, however such encrypted code is not able to decrypted by the client using the key pass. Help needed. I have 1% knowledge about encryption.

What is it doing that makes it not work. If you’re using the plugin with the yellow icon I think it broke from some Plugin API changes last month