Oops see above please
1 answer
11:08 pm / 23:08 is the last RER C train from Champ de Mars station to Versailles Rive Gauche. Note that this is from May 2, 2023 onwards. There are rail maintenance works ongoing currently (April 23 - May 1, 2023) that will affect evening RER C trains between Paris & Versailles, interrupting/ending service earlier than usual.
There is one more train from Javel RER C station (one stop further south along the line) that departs at 00:11 to Versailles Rive Gauche. But, after that the next train is 05:38 in the morning from Champ de Mars.