So I was trying to fire this to the client however it was giving me this error. Not entirely used to this Engine yet so I've a lot of things to learn from here lol, if anyone can find me a solution that would be much appreciated.
Sorry, but it's not really clear what is happening here. It cannot be seen what is on line 26 of SharedPlayerData (the error) from your post.
Please post a simple replicator of your problem (i.e. the simplest possible client and server scripts that reproduce the error) with a complete server script, labelled server script and a complete client script, labelled client script. And the error message. Please ensure you post the scripts so that the line number referenced in the error is the same in the posted script.
And please posts scripts using preformatted text tag (</>) not images.