App Store crashes immediately

Looking through similar posts on this board, the only suggestion I found was to reset permissions. I did this (Onyx) and restarted, but the problem remains.

Here is some of my crash report:

Process: App Store [419]

Path: /Applications/App Store.app/Contents/MacOS/App Store

Identifier: com.apple.appstore

Version: ???

Build Info: Commerce-376029000000000~1

Code Type: X86-64 (Native)

Parent Process: ??? [1]

Responsible: App Store [419]

User ID: 501

Date/Time: 2015-08-29 15:23:46.998 -0400

OS Version: Mac OS X 10.10.5 (14F27)

Report Version: 11

Anonymous UUID: D68348FB-AAC2-F0E3-1F9A-B188592D9FCD

Time Awake Since Boot: 77 seconds

Crashed Thread: 0

Exception Type: EXC_CRASH (Code Signature Invalid)

Exception Codes: 0x0000000000000000, 0x0000000000000000

kernel messages:

VM Regions Near 0x7fff7d2e50a0 (cr2):

__LINKEDIT 00007fff622cd000-00007fff622e1000 [ 80K] r--/rwx SM=COW /usr/lib/dyld

--> Submap 00007fff70000000-00007fff80000000 [256.0M] r--/rwx SM=PRV process-only VM submap

unused shlib __DATA 00007fff7b561000-00007fff7db61000 [ 38.0M] rw-/rw- SM=COW system shared lib __DATA not used by this process

Thread 0 Crashed:

0 dyld 0x00007fff6225e000 _dyld_start + 0

Thread 0 crashed with X86 Thread State (64-bit):

rax: 0x000000000000000d rbx: 0x0000000000000000 rcx: 0x0000000000000000 rdx: 0x0000000000000000

rdi: 0x0000000000000000 rsi: 0x0000000000000000 rbp: 0x0000000000000000 rsp: 0x00007fff550d4c90

r8: 0x0000000000000000 r9: 0x0000000000000000 r10: 0x0000000000000000 r11: 0x0000000000000000

r12: 0x0000000000000000 r13: 0x0000000000000000 r14: 0x0000000000000000 r15: 0x0000000000000000

rip: 0x00007fff6225e000 rfl: 0x0000000000000201 cr2: 0x00007fff7d2e50a0

Logical CPU: 0

Error Code: 0x020000f4

Trap Number: 133

And here is the Console report:

2015/08/29 3:37:03.416 PM taskgated[99]: killed com.apple.appstore[pid 563] because its use of the com.apple.private.accounts.allaccounts entitlement is not allowed (error code -67030)

2015/08/29 3:37:03.429 PM com.apple.xpc.launchd[1]: (com.apple.ReportCrash[565]) Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.ReportCrash

2015/08/29 3:37:03.467 PM ReportCrash[565]: Trying to extract VM information using cr2

2015/08/29 3:37:03.492 PM com.apple.xpc.launchd[1]: (com.apple.appstore.40644[563]) Binary is improperly signed.

2015/08/29 3:37:12.204 PM ReportCrash[565]: Saved crash report for App Store[563] version ??? to /Users/scott/Library/Logs/DiagnosticReports/App Store_2015-08-29-153712_MacBook-Pro.crash