Stuck at black 'sony' screen, flashtools/PCC not functioning

Hey folks, I was following the how-to-root thread and made it to the very end without seeing any error messages. Unfortunately, when I booted up the device, it got stuck at the black 'sony' screen. So I dutifully scrolled up to step 1, as I have done plenty of times before, but I am having some trouble recovering my device. Also I feel like I should say, my previous 5.0.2 install was done using that thread with no issues, but I'd like to get up to 5.1.1 since I heard the memory management issues I've been having were improved.

FWs were acquired from the sticky firmware thread:

• 23.0.1.A.5.77 - Unbranded - USA (1289-7524)


• 23.4.A.0.546 - Unbranded - USA (1289-7524)

Here is my flashtools error:

21/054/2015 21:54:52 - INFO - Flashtool Version 0.9.19.3 built on 13-09-2015 17:00:00
21/054/2015 21:54:52 - INFO - Executing search strategies to find proxy selector
21/054/2015 21:54:52 - INFO - No proxy found for IE. Trying next one
21/054/2015 21:54:52 - INFO - Strategy firefox failed trying next one : No Firefox installation found
21/054/2015 21:54:52 - INFO - No proxy found for java. Trying next one
21/054/2015 21:54:52 - INFO - Syncing devices from github
21/054/2015 21:54:53 - INFO - Scanning devices folder for changes.
21/055/2015 21:55:01 - INFO - Pulling changes from github.
21/055/2015 21:55:01 - INFO - Devices sync finished.
21/055/2015 21:55:05 - INFO - Device disconnected
21/057/2015 21:57:00 - INFO - Selected Bundle for Sony Xperia Z3 Compact (D5803). FW release : 23.0.A.2.93. Customization : USA
21/057/2015 21:57:00 - INFO - Preparing files for flashing
21/057/2015 21:57:12 - INFO - Please connect your device into flashmode.
21/057/2015 21:57:19 - INFO - Device connected in flash mode
21/057/2015 21:57:19 - INFO - Opening device for R/W
21/057/2015 21:57:19 - INFO - Reading device information
21/057/2015 21:57:19 - INFO - Phone ready for flashmode operations.
21/057/2015 21:57:19 - INFO - Opening TA partition 2
21/057/2015 21:57:20 - INFO - Current device : Unknown: Apr 13 2015/13:21:35 - YT91127UXN - Unknown: Apr 13 2015/13:21:35 - 1285-6521_23.1.A.1.28 - Unknown: Apr 13 2015/13:21:35
21/057/2015 21:57:20 - INFO - Closing TA partition
21/057/2015 21:57:20 - INFO - Start Flashing
21/057/2015 21:57:20 - INFO - Processing loader.sin
21/057/2015 21:57:20 - INFO - Checking header
21/057/2015 21:57:20 - INFO - Flashing data
21/057/2015 21:57:20 - INFO - Loader : S1_Root_9c84 - Version : MSM8974AB_22 / Boot version : S1_Boot_MSM8974AC_LA3.0_52-2 / Bootloader status : ROOTABLE
21/057/2015 21:57:20 - INFO - Max packet size set to 512K
21/057/2015 21:57:20 - INFO - Parsing boot delivery
21/057/2015 21:57:20 - INFO - Ending flash session
21/057/2015 21:57:21 - ERROR -
21/057/2015 21:57:21 - ERROR - Error flashing. Aborted
21/057/2015 21:57:21 - INFO - Device connected in flash mode
21/057/2015 21:57:21 - INFO - Device disconnected
21/057/2015 21:57:24 - INFO - Device connected in flash mode
21/005/2015 22:05:21 - INFO - List of connected devices (Device Id) :
21/005/2015 22:05:21 - INFO - - USB\VID_0FCE&PID_ADDE&1E313DEC&0&4 Driver installed : true
21/005/2015 22:05:21 - INFO - List of ADB devices :
21/005/2015 22:05:21 - INFO - - none
21/005/2015 22:05:21 - INFO - List of fastboot devices :
21/005/2015 22:05:21 - INFO - - none

And I'm also having trouble with PC Companion's repair function: