Recording failed with Error... can't render anymore...

Recording failed with Error : The video format is not supported.

It's been few days I working on a editing / grading in Da Vinci.

I work on the latest MacBook Pro (Retina, 15-inch, Mid 2015)
My footages are DNG sequence from a black magic cinema camera 2.5k.

My output is 3840 x 2160

I did a bunch of corrections and render over an hundred shots already without any problems.
I try now to output new files and since yesterday I got this error message.
After trying to render in different places, even lower output format I am simply stucks.
My configuration is the same, I got space on my drive, I didn't change anything in my configuration...

But so far nothing works anymore and there is not any rational explanation I can see so far, it just simply don't want to render anymore.

Anybody have a solution for this ?

I am already in Admin mode, I also empty the cache, change also the cache directory, lower the Raw decoder to smart mode... without any success.

As I am stuck on a deadline hope somebody got a solution
Thanks.

This has just happened to me - I've been editing/grading with the same UHD ProRes HQ footage for 3 days.
Now all of a sudden my renders FAIL! "Video format unsupported" I have deadlines!!!!

I've sorted it by clearing any additional outputs in the Render settings Tab [I must of accidentally selected AVI] on the Deliver page : )