I thought you have the same issue that I noticed yesterday during the 5th installation of the same 2014.30 EU mapset. I did not know what could be wrong (unlocked and checked everything more than twice) until I saw the map reflashing progress bar does not reach 100% and the whole system turns off at about 98%
Previously I could leave the car alone while reflashing in ACC mode and it was able to complete the install. Now I had to press the button to ACC or RUN mode again at about 90% to keep it up.
I do not know why this installation took so long when this mapset is 6.25GB vs 6.22GB (2014.20)
Maybe you ought to try to delete gmapprom.img by flashing the cure firmware into your CTP.
Normally you are not able to delete gmapprom.img from the file manager, because system is trying to use it and this file is automatically protected.
You can prepare yourself the cure firmware by editing your current gupdate.gcd file slightly.
Be sure you have a secure copy of your gupdate.gcd just in case.
All you need is to install some hex editor (I use HxD) and open your original gupdate.gcd with it.
Go to "Search" -> "Search and replace" (Ctrl+R) -> tick "Unicode string" and Direction "Everywhere"
type where "Search" gmapprom.img and "Replace with" gmmorppa.img (or any other combination of switched signs, just to have the same alphanumeric sum) -> click "Change everything" -> you will have a pop-up window with the number of entries changed -> click save and thats it.
Now you need to reflash this firmware from "Garmin Recovery Mode" from the Dealer Menu.
After reflashing is complete take out your USB stick, "software loading" is shown in navi screen, let it a few minutes to complete and wait until the system fully loads to "Where to?" / "View Map" screen.
Then turn the power off, open the door and shut it. Do not touch anything ;-), wait until the USB port light is off and then switch to ACC and wait for "Where to?" screen again - repeat this procedure twice.
Go to file manager and delete gmapprom.img
Now you can reflash your original firmware again and repeat above steps with software loading, door shutting and USB light ;-)
Before next map installation you may also first "Erase All User Data" by press and hold the right hand bottom corner of boot screen when white CTP13 and some text below appears under your Chrysler logo.
You may also clear Novol from hidden menu ("Novol Available" three pararell lines and "Clear Novol".
These above may erase your recently found, favourites, settings etc but maybe your system needs some refreshing to accept new mapset.
Then try to install your fresh mapset again.
I can not guarantee the above will help or will not make any worse crap :-) but I tested it and worked for me when I was in big trouble :-)