[Xperia Z5 Compact Q&A, Help & Troubleshooting] mfconners:
I started this root process:

http://xdaforums.com/z5-compact/general/summary-tutorial-root-sony-xperia-z5-t3360515

I downloaded E5803_StoreFront_1299-8255_32.0.A.6.200_R2B, built the FTF, and flashed... and accidentally removed the cable prematurely. No problem, it let me start again. It restarted, rebuilt the Dalvik, and started the setup process. Then I get errors of the "Unfortunately, the process com.android.phone has stopped." variety. Also android.process.acore and android.process.media are crashing.

Things I've tried:

-- Hitting OK just leads to the next error. I can't continue the setup process. The best I've been able to do is hold the power button, click OK and then Power Off or Reboot quickly. Yay. I can turn it off.

-- Holding down volume and plugging in while running Flashtool nothing connects. USB Debugging is disabled. Logs below...

-- Holding up volume & powering on does nothing.

-- Holding down volume & powering on tells me I'm in safe mode but doesn't open any new options for fixing it.

-- Xperia Companion Software Repair. Plugging in while holding the down volume does nothing.

FlashTool Logs:

21/031/2016 20:31:17 - INFO - Flashtool Version 0.9.22.3 built on 08-06-2016 22:30:00

21/031/2016 20:31:17 - INFO - Executing search strategies to find proxy selector

21/031/2016 20:31:17 - INFO - No proxy found for IE. Trying next one

21/031/2016 20:31:17 - INFO - Strategy firefox failed trying next one : No Firefox installation found

21/031/2016 20:31:17 - INFO - No proxy found for java. Trying next one

21/031/2016 20:31:17 - INFO - Syncing devices from github

21/031/2016 20:31:17 - INFO - Opening devices repository.

21/031/2016 20:31:18 - INFO - Scanning devices folder for changes.

21/031/2016 20:31:22 - INFO - Changes have been found. Doing a hard reset (removing user modifications).

21/031/2016 20:31:23 - INFO - Pulling changes from github.

21/031/2016 20:31:23 - INFO - Quietly closing devices repository.

21/031/2016 20:31:23 - INFO - Devices sync finished.

21/031/2016 20:31:23 - INFO - Loading devices database

21/031/2016 20:31:23 - INFO - Loaded 91 devices

21/031/2016 20:31:23 - INFO - Starting phone detection

21/031/2016 20:31:28 - INFO - Device disconnected

21/031/2016 20:31:41 - INFO - Selected Bundle for Sony Xperia Z5 Compact(E5803). FW release : 32.0.A.6.200. Customization : Internal

21/031/2016 20:31:41 - INFO - Preparing files for flashing

21/032/2016 20:32:09 - INFO - Please connect your device into flashmode.

21/038/2016 20:38:14 - INFO - Device connected with USB debugging off

21/038/2016 20:38:14 - INFO - For 2011 devices line, be sure you are not in MTP mode

21/038/2016 20:38:22 - INFO - Flash canceled

21/038/2016 20:38:29 - INFO - List of connected devices (Device Id) :

21/038/2016 20:38:29 - INFO - - USB\VID_0FCE&PID_51DA&MI_00\6&23E893A&0&0000	Driver installed : true

21/038/2016 20:38:29 - INFO - - USB\VID_0FCE&PID_51DA&MI_01\6&23E893A&0&0001	Driver installed : true

21/038/2016 20:38:29 - INFO - - USB\VID_0FCE&PID_51DA\CB5A29BD3T	Driver installed : true

21/038/2016 20:38:29 - INFO - List of ADB devices :

21/038/2016 20:38:29 - INFO - - none

21/038/2016 20:38:29 - INFO - List of fastboot devices :

21/038/2016 20:38:29 - INFO - - none

Any ideas?

[UPDATES] Clarified the actions taken and the results. Added FlashTool logs.