No intent in timeline(for:with:completion:) for ios 14 widgets

Having the same issue here. It was working and then I reset the simulator.

I've validated that SiriKit has requested the proper permissions, my App Groups are enabled for data sharing. If I try to load widgets, Springboard crashes with this error. Running my app from the simulator using the Widget scheme causes the same crash.

Here is my crash log from the Simulator:

Code Block Process:               SpringBoard [91302]
Path:                  /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/CoreServices/SpringBoard.app/SpringBoard
Identifier:            SpringBoard
Version:               1.0 (50)
Code Type:             X86-64 (Native)
Parent Process:        launchd_sim [91160]
Responsible:           SimulatorTrampoline [1334]
User ID:               501
Date/Time:             2020-09-19 17:09:28.958 -0400
OS Version:            Mac OS X 10.15.6 (19G2021)
Report Version:        12
Anonymous UUID:        7E97BB0C-F20E-662A-7578-F9D9BEA40844
Sleep/Wake UUID:       F44A61AA-0164-4838-9E24-43AB82A02375
Time Awake Since Boot: 230000 seconds
Time Since Wake:       100000 seconds
System Integrity Protection: enabled
Crashed Thread:        0  Dispatch queue: com.apple.main-thread
Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY
Application Specific Information:
LaunchServices observer: Installed (
    "<LSApplicationProxy: 0x60000031e2f0> com.mciarlo.Doo file:///Users/michaelciarlo/Library/Developer/CoreSimulator/Devices/87D10C9C-DFBB-4389-B855-CC0AB515581D/data/Containers/Bundle/Application/2E040815-14FF-4AE3-B323-E3C21C300062/Doo.app/ <com.mciarlo.Doo <installed >:0>"
) {7E5DEF5B-91FD-487A-83D0-A4BC1F55C2D3 460}
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Property 'identifier' is not a valid NSString subclass'
terminating with uncaught exception of type NSException
abort() called
CoreSimulator 732.17 - Device: iPhone 11 Pro (87D10C9C-DFBB-4389-B855-CC0AB515581D) - Runtime: iOS 14.0 (18A372) - DeviceType: iPhone 11 Pro
Application Specific Backtrace 1:
0   CoreFoundation                      0x00007fff2043a126 exceptionPreprocess + 242
1   libobjc.A.dylib                     0x00007fff20177f78 objc_exception_throw + 48
2   Intents                             0x00007fff2dad58f6 -[INCodable _objectDescription] + 0
3   Intents                             0x00007fff2dad6530 28-[INCodable _writeTo:error:]_block_invoke.267 + 2464
4   Intents                             0x00007fff2dad4358 -[INCodable _writeTo:error:] + 695
5   Intents                             0x00007fff2dad1973 -[INCodable writeTo:] + 56
6   ProtocolBuffer                      0x00007fff22cd54d6 PBDataWriterWriteSubmessage + 47
7   Intents                             0x00007fff2dad5a4b 28-[INCodable _writeTo:error:]_block_invoke_2 + 218
8   Intents                             0x00007fff2dad5c4f 28-[INCodable _writeTo:error:]_block_invoke.267 + 191
9   Intents                             0x00007fff2dad4358 -[INCodable _writeTo:error:] + 695
10  Intents                             0x00007fff2dad4484 -[INCodable _dataWithError:] + 58
11  Intents                             0x00007fff2dad4787 -[INCodable _copyWithZone:error:] + 96
12  Intents                             0x00007fff2dad2ea1 -[INCodable copyWithZone:] + 56
13  Intents                             0x00007fff2db60804 -[INIntent copyWithZone:] + 125
14  libobjc.A.dylib                     0x00007fff2018b346 objc_setProperty_nonatomic_copy + 36
15  ChronoServices                      0x00007fff57f67e3d 42-[CHSAvocadoDescriptor loadDefaultIntent:]_block_invoke_2 + 78
16  libdispatch.dylib                   0x00007fff2010535b _dispatch_call_block_and_release + 12
17  libdispatch.dylib                   0x00007fff20106534 _dispatch_client_callout + 8
18  libdispatch.dylib                   0x00007fff20113011 _dispatch_main_queue_callback_4CF + 1045
19  CoreFoundation                      0x00007fff203a8276 CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 9
20  CoreFoundation                      0x00007fff203a2b06 CFRunLoopRun + 2685
21  CoreFoundation                      0x00007fff203a1b9e CFRunLoopRunSpecific + 567
22  GraphicsServices                    0x00007fff2b773db3 GSEventRunModal + 139
23  UIKitCore                           0x00007fff24660af3 -[UIApplication _run] + 912
24  UIKitCore                           0x00007fff24665a04 UIApplicationMain + 101
25  SpringBoard                         0x00007fff5a21cf8b SBSystemAppMain + 7504
26  libdyld.dylib                       0x00007fff20257415 start + 1

I don't know if I'm on the right track, but avoiding the identifier and displayName properties for my own (which do appear in the generated file) causes my widget to render without an error. Unfortunately the Add Widget screen crashes with the same "No intent" error because it tries to use identifier.

I hope this at least gets us closer to a solution.

Remove the widget you config, and add it back again. It works for me.