Bug Report: Load Gauntlet crash Forge version 1.5.23-r26900

Hi all !
I play with the latest version of Forge on a MAC (Mavericks OS). I use Java 7 and always is fine except launch a custom Gauntlet
I can play with Quick Gauntlet function, I can create a Gauntlet but cannot load it. Forge crashes every time.
I choose custom User decks in order to create the Gauntlet
Here is the error msg:
Apologies for my English
Any idea?
I play with the latest version of Forge on a MAC (Mavericks OS). I use Java 7 and always is fine except launch a custom Gauntlet
I can play with Quick Gauntlet function, I can create a Gauntlet but cannot load it. Forge crashes every time.
I choose custom User decks in order to create the Gauntlet
Here is the error msg:
- NullPointerException | Open
Apologies for my English

Any idea?