Failed to load Outer for Resource

Hi,

each time I open my project, I get log errors. I have to keep compiling the widgets in order to resolve this issue but the problem keeps occurring each time I open the project again. It is annoying, but the main reason is that I can`t package my project to .exe.
I create FP game without C++. Create Pause Menu with Quit and Resume buttons using Widget. I followed the instructions there https://docs.unrealengine.com/latest/INT/Engine/UMG/QuickStart/5/. And nothing else. The Pause Menu works fine in Play mode.
Please help, this is only small project, but I have the same problem with another large project and I am not able to package it. I create this small example to recreate the problem with same errors.

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