Have already tried everything in your link and none of that works.
Below is the Unexpectedly Quit data:
Process: PrintLife [2281]
Path: /Applications/PrintLife.app/Contents/MacOS/PrintLife
Identifier: com.chronos.PrintLife
Version: ???
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: PrintLife [2281]
User ID: 503
Date/Time: 2018-03-19 08:16:11.881 -0700
OS Version: Mac OS X 10.12.6 (16G1212)
Report Version: 12
Anonymous UUID: 74C13EAF-4F27-2D61-B8C2-2C493797506C
Sleep/Wake UUID: DD94E418-EE7F-4633-BF68-B47BBF3304AB
Time Awake Since Boot: 20000 seconds
Time Since Wake: 1300 seconds
System Integrity Protection: enabled
Crashed Thread: 0
Exception Type: EXC_CRASH (Code Signature Invalid)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Termination Reason: Namespace CODESIGNING, Code 0x1
kernel messages:
VM Regions Near 0 (cr2):
-->
__TEXT 00000001098f6000-0000000109aad000 [ 1756K] r-x/rwx SM=COW @j [(null)]
Thread 0 Crashed:
0 d\ 0x000000010cc1d000 _dyld_start + 0
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x0000000000000000 rbx: 0x0000000000000000 rcx: 0x0000000000000000 rdx: 0x0000000000000000
rdi: 0x0000000000000000 rsi: 0x0000000000000000 rbp: 0x0000000000000000 rsp: 0x00007fff56309c20
r8: 0x0000000000000000 r9: 0x0000000000000000 r10: 0x0000000000000000 r11: 0x0000000000000000
r12: 0x0000000000000000 r13: 0x0000000000000000 r14: 0x0000000000000000 r15: 0x0000000000000000
rip: 0x000000010cc1d000 rfl: 0x0000000000000200 cr2: 0x0000000000000000
Logical CPU: 0
Error Code: 0x00000000
Trap Number: 0
Binary Images:
0x1098f6000 - 0x109aacff7 +d\ (0) <D7ABE602-3F2A-37C4-8197-86C01D5CF88A> d\
0x10cc1c000 - 0x10cc59dc7 +d\ (433.5) <93EA668C-4BB2-3646-96E9-B406B81308D6> d\
External Modification Summary:
Calls made by other processes targeting this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by all processes on this machine:
task_for_pid: 9836
thread_create: 0
thread_set_state: 0
VM Region Summary:
ReadOnly portion of Libraries: Total=2172K resident=0K(0%) swapped_out_or_unallocated=2172K(100%)
Writable regions: Total=8400K written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=8400K(100%)
VIRTUAL REGION
REGION TYPE SIZE COUNT (non-coalesced)
=========== ======= =======
STACK GUARD 56.0M 2
Stack 8192K 2
__DATA 540K 4
__LINKEDIT 168K 3
__TEXT 2004K 3
shared memory 8K 3
=========== ======= =======
TOTAL 66.7M 11
Model: Macmini6,2, BootROM MM61.010B.B00, 4 processors, Intel Core i7, 2.3 GHz, 8 GB, SMC 2.8f1
Graphics: Intel HD Graphics 4000, Intel HD Graphics 4000, Built-In
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x859B, 0x435435313236344246313630422E43313646
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x859B, 0x435435313236344246313630422E43313646
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x10E), Broadcom BCM43xx 1.0 (7.21.171.133.1a2)
Bluetooth: Version 5.0.5f1, 3 services, 27 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Serial ATA Device: APPLE HDD HTS541010A9E662, 1 TB
USB Device: USB 2.0 Bus
USB Device: Hub
USB Device: Hub
USB Device: IR Receiver
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
USB Device: USB 2.0 Bus
USB Device: Hub
USB Device: Keyboard Hub
USB Device: Apple Keyboard
USB Device: USB 3.0 Bus
USB Device: Apple USB SuperDrive
USB Device: MX880 series
Thunderbolt Bus: Mac mini, Apple Inc., 23.4