Invalid resource entry creating uniform buffer

Hi. I put this post here because of the error inside RenderingThread.cpp,
After creating a custom font for RenderText, the project is no longer able to run.
Now the project can be opened only after 4-5 restarts.
If i delete the RenderText all works fine

Can you tell why there is such a terrible error occurs?

LogWindows:Error: === Critical error: ===
LogWindows:Error: 
LogWindows:Error: Fatal error: [File:D:\Build\++UE4+Release-4.14+Compile\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp] [Line: 791] 
LogWindows:Error: Rendering thread exception:
LogWindows:Error: Assertion failed: InResources[i] [File:D:\Build\++UE4+Release-4.14+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11UniformBuffer.cpp] [Line: 214] 
LogWindows:Error: Invalid resource entry creating uniform buffer, Material.Resources[1], ResourceType 0x8.

It was fixed. The problem has been in the Material Instance`s parent (DefaultTextMaterialTranslucent)