Hello there,
The page for support is https://support.gearsofwar.com/hc/en-us/
the link to fill out a ticket is below 
Hello there,
The page for support is https://support.gearsofwar.com/hc/en-us/
the link to fill out a ticket is below 
I’ve already reported the bug and I have a ticket number, but no answer yet. @Da_Echu, did you send your report using this page too?
And I have already been in contact with support for over a week, plus the week where I tried on my own to solve it. This issue needs to be addressed. If you google it you’ll see people complaining about the same error since last year…
Yeah, and people have the same problem with other games. There’s something in common with all this issues, all games are using Unreal Engine. It’s always the same message, the only difference is the filename.
Here with another Epic game:
https://www.reddit.com/r/FortNiteBR/comments/8s5pps/failed_to_open_descriptor_file_fortnite/
Problem is Xbox Game App doesn’t have a verify data option
I installed again Windows 10. With a clean install of the system, and after installing Gears 5 again for fifth time, the error continues to appear. I can’t play the game. This is ridiculous. @Da_Echu, I suppose that support team will not take in consideration our case, because we are only 2 persons with this problem. But it’s so funny that installing Gears 5 on a clean Windows 10, it gives the same error again.
It’s not our Windows 10 installation, or a faulty disk, or our PCs, it’s a fault of the game, so annoying and frustrating. The Coalition, what the hell is going on? You don’t want us to play your game?
Nah, go to reddit, it’s full of people complainig about same thing, here two examples:
Mod edit: Please post in English only as per the forum rules. Thank you.
After updating ‘‘Gaming Services Xbox’’ the error we are talking about happens… More and more we are…
Having the same problem too. Submitted a case, and I’ve done everything short of a fresh install of windows and wipe of my C drive. Not super optimistic right now, especially considering support said it would be 14 days until they’ll be able to respond
Joining to the club… here we go!

The same problem… 
Same issue here
anyone who updates the gaming services the microsoft will not be able to play gears 5
this they have to solve
PS on steam the game runs smoothly
They have no idea or dont give a ■■■■ about this error. They barely have a playerbase to worry about, so… bye gears 5 I guess 
Same error here, my friend too
Formatted main drive: nothing.
Bought a new SSD, 1TB M.2, freshly new, installed W10 Pro on it. Game still can’t be played.
there go 3 weeks of booster pack wasted.
ist a problem with the update of gaming service the microsoft
If you put in a ticket, please check your ticket that it specifically mentions it’s an issue with descriptor file.
We will need your DX Diag and how/where you are running the game - MS Store or Steam.
Closing this in the meantime as yes, we are investigating these tickets, we just need to know this is related to a currently investigated issue.