Kent Live says negotiations may have hit a snag.
The Addicks have been in talks with the Eagles over the 22-year-old attacker since last week, and met the player and representatives on Friday.
The deal was expected to go through before the weekend, in hope the player could have been involved in the matchday squad to face Walsall.
There is a chance now the deal could be off for the time being. It may be revisited at a later stage.