The app was working until yesterday but now tries to start and immediately dies.  I'm on Windows 10.  Below is the debugger output.

[10904] ds\security\smartscreen\common\core\src\script_host.cpp(51)\smartscreen.exe!00007FF6EB1B5697: (caller: 00007FF6EB1B5DD8) Exception(32) tid(2f60) 80070001 Incorrect function.
[10904] Msg:[Unable to get property 'substr' of undefined or null reference - TypeError: Unable to get property 'substr' of undefined or null reference
[10904] at ShellCallbacks.isFileSupported (Unknown script code:1:2387)
[10904] at ShellCallbacks.prototype.getSamplingRate (Unknown script code:1:2988)
[10904] at Anonymous function (Unknown script code:1:925)
[10904] at Array.prototype.reduce (native code)
[10904] at CallbacksBase.prototype.getSamplingRates (Unknown script code:1:900)
[10904] at CallbacksBase.prototype.filterEvents (Unknown script code:1:2036)
[10904] at filterEvents (Unknown script code:1:43)
[10904] at _dispatch (Unknown script code:13:21)]
[10904] ds\security\smartscreen\common\core\src\script_host.cpp(51)\smartscreen.exe!00007FF6EB1B5697: (caller: 00007FF6EB1B5DD8) Exception(33) tid(2f60) 80070001 Incorrect function.
[10904] Msg:[Unable to get property 'substr' of undefined or null reference - TypeError: Unable to get property 'substr' of undefined or null reference
[10904] at ShellCallbacks.isFileSupported (Unknown script code:1:2387)
[10904] at ShellCallbacks.prototype.getSamplingRate (Unknown script code:1:2988)
[10904] at Anonymous function (Unknown script code:1:925)
[10904] at Array.prototype.reduce (native code)
[10904] at CallbacksBase.prototype.getSamplingRates (Unknown script code:1:900)
[10904] at CallbacksBase.prototype.filterEvents (Unknown script code:1:2036)
[10904] at filterEvents (Unknown script code:1:43)
[10904] at _dispatch (Unknown script code:13:21)]
[15368] PackageLocation: "localweb/package.json"
[15368] package.json opened
[15368] package.json valid
[15368] package.json object
[15368] package.json version value = "4.29.4"
[15368] Reading config.ini file
[15368] force_server= false value= ""
[9996] Suspending
[6012] shell\explorer\taskband2\taskband2.cpp(4148)\Explorer.EXE!00007FF7EAA1792A: (caller: 00007FFBA6337DE3) ReturnHr(70) tid(2484) 80004005 Unspecified error