You cannot upload Snapmatic photos to Social Club if you had graphic mods installed. (most of the time)
So, I did an experiment from a week ago regarding uploading photos to Social Club, and found out that if your GTA V copy is detected having graphic mods, the game will post an error when you try to upload a Snapmatic photo to Social Club. It says: "Failed to upload picture to Social Club. Please try again."
This literally always happened to my copy most of the time, but when I try it on my GTA V copy on my sister's computer with no graphic mods installed, nothing goes wrong.
For example, here's some photos comparison:
No graphic mods:
VisualV graphic mod (lucky enough to be uploadable):
Does this happened to you too? Feel free to comment!
The only issue I have is that photos I take when using a ped model other than one of the three protagonists do not post to the social club. They show in my gallery, but I can't upload them. I noticed this with and without using mods (visual or otherwise).