Wireshark doesn't decrypt TLS_PSK_WITH_AES_128_GCM_SHA256 cipher.
Hello, im using TLS_PSK_WITH_AES_128_GCM_SHA256 cipher with PSK and TLS1.2, It doesn't want to decrypt the data that i recieve. What could be the issue?
Insufficient information to even make an attempt to help. TLS decryption does require some setup (otherwise everyone would be peeking at your TLS traffic.
The TLS dissector can create a debug log file, sharing that would be a start. See the TLS Wiki page for some help.