Sky replacement

[SovannaMen]

Hi, I am a newer in Ps 2023. I bought sky replacement and installed it. after restarting The Ps, in the edit, Sky replacement still dimmed. How to do? I use McOs

[Kevin Stohlmeyer]

Is your image in 8-bit RGB format? Also what do you mean by "I bought sky replacement and installed it"..? Sky replacement comes as part of Photoshop - its not a separate purchase or install...