1P crashes immediately when trying to start it on MacOS Mojave 10.14.6

I try to start the app and get the message: "1Password 7 quit unexpectedly." The details are:

Process: 1Password 7 [9893]
Path: /Applications/1Password 7.app/Contents/MacOS/1Password 7
Identifier: 1Password 7
Version: ???
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: 1Password 7 [9893]
User ID: 503

Date/Time: 2019-10-03 18:47:47.246 -0400
OS Version: Mac OS X 10.14.6 (18G103)
Report Version: 12
Anonymous UUID: 0D80128A-95DF-2D5B-AB4D-C9ADD31CE125

Time Awake Since Boot: 17000 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 000000010b0bd000-000000010b4c1000 [ 4112K] r-x/rwx SM=COW

Thread 0 Crashed:
0 0x000000010e4cc000 _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: 0x00007ffee4b42bb8
r8: 0x0000000000000000 r9: 0x0000000000000000 r10: 0x0000000000000000 r11: 0x0000000000000000
r12: 0x0000000000000000 r13: 0x0000000000000000 r14: 0x0000000000000000 r15: 0x0000000000000000
rip: 0x000000010e4cc000 rfl: 0x0000000000000200 cr2: 0x0000000000000000

Logical CPU: 0
Error Code: 0x00000000
Trap Number: 0

Binary Images:
0x10b0bd000 - 0x10b4c0ff7 + (0)
0x10e4cb000 - 0x10e53570f + (655.1.1)

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: 12645
thread_create: 0
thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=5036K resident=0K(0%) swapped_out_or_unallocated=5036K(100%)
Writable regions: Total=8420K written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=8420K(100%)

                            VIRTUAL   REGION 

REGION TYPE SIZE COUNT (non-coalesced)
=========== ======= =======
STACK GUARD 56.0M 1
Stack 8192K 1
__DATA 1288K 4
__LINKEDIT 496K 2
__TEXT 4540K 2
shared memory 8K 2
=========== ======= =======
TOTAL 70.2M 12

Model: iMac15,1, BootROM 230.0.0.0.0, 4 processors, Intel Core i5, 3.3 GHz, 32 GB, SMC 2.22f16
Graphics: kHW_AMDRadeonR9M290Item, AMD Radeon R9 M290, spdisplays_pcie_device, 2 GB
Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1600 MHz, 0x802C, 0x31364B544631473634485A2D314736453220
Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1600 MHz, 0x802C, 0x31364B544631473634485A2D314736453220
Memory Module: BANK 0/DIMM1, 8 GB, DDR3, 1600 MHz, 0x802C, 0x31364B544631473634485A2D314736453220
Memory Module: BANK 1/DIMM1, 8 GB, DDR3, 1600 MHz, 0x802C, 0x31364B544631473634485A2D314736453220
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x142), Broadcom BCM43xx 1.0 (7.77.61.2 AirPortDriverBrcmNIC-1305.8)
Bluetooth: Version 6.0.14d3, 3 services, 27 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: APPLE SSD SM0512G, 500.28 GB
USB Device: USB 3.0 Bus
USB Device: BUP Slim BK
USB Device: USB3.0 Hub
USB Device: USB3.0 Hub
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
USB Device: FaceTime HD Camera (Built-in)
USB Device: Apple USB SuperDrive
USB Device: USB2.0 Hub
USB Device: Magic Trackpad 2
USB Device: USB2.0 Hub
Thunderbolt Bus: iMac, Apple Inc., 26.1

What should I do?

1Password Version: Don't know. Can't open it.
Extension Version: 4.7.5.90
OS Version: 10.14.6
Sync Type: Not sure. Dropbox?
Referrer: forum-search:crashes immediately at startup