What went wrong between Dinesh Vijan and Saif?

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Posted: 5 years ago
I remember at one time how Saif would not stop raving about his best friend and partner Dinesh, then suddenly their relationship soured and they split up. Dinesh is now turning out to be a successful producer with back to back hits in Stree and Luka Chupi.
I also found it surprising that Sara attended Dinesh's wedding and that he cast her in Love Aaj Kal 2. 

So what went wrong between them? Did the slew of flops produced by Illuminati Films strain their friendship?