ok, everyone who could not solve the problem with opening the application, and which was gray, and applications that are not able to see in the store button to install, I found the solution
I entered the store through the computer and logged in to your Microsoft account.
I found wechat app and send it to my phone.
I uninstall it from the phone only when I saw it in a store that is on hold
When I confirmed installation error 8103010d came out .
I insisted, and after several attempts the installation is successfully completed.
I am satisfied and I hope that i helped you.

#wechat