Sorry, there are some XML files stored in your project, and since the XML contains some useless newline/tab chars, so, the XML becomes very large.
Committing project may be failed to open those XML.
The newline/tab chars problem should be fixed in 1, 2 months before. But, seems there is another bug that, committing project will reproduce the newline/tab chars.
We will fix it asap. 
Before the fixing, you can fix your project (reduce the XML size) by Help > About dialog, Utilities tab, click the Compact Project button to fix your project.
After that, I think you will be able to commit the project. Sorry for any inconvenient.
