Runtime critical type System.RuntimeType not found

Native stacktrace:

	0   FinchClient                          0x00000001032bcafa mono_handle_native_sigsegv + 282
	1   libsystem_platform.dylib            0x00007fff89b1452a _sigtramp + 26
	2   FinchClient                          0x0000000103552a28 mono_polling_required + 6416
	3   libsystem_c.dylib                   0x00007fff923cb6df abort + 129
	4   FinchClient                          0x0000000103451549 monoeg_log_default_handler + 105
	5   FinchClient                          0x0000000103451623 monoeg_g_log + 211
	6   FinchClient                          0x0000000103302901 mono_class_load_from_name + 145
	7   FinchClient                          0x000000010331889d mono_init_internal + 1805
	8   FinchClient                          0x00000001032cae50 mini_init + 944
	9   FinchClient                          0x0000000103223dde mono_main + 4414
	10  FinchClient                          0x00000001031caee4 xamarin_main + 980
	11  FinchClient                          0x00000001031cbbf4 main + 36
	12  libdyld.dylib                       0x00007fff85a525ad start + 1

Debug info from gdb:

(lldb) command source -s 0 '/tmp/mono-gdb-commands.moTTS8'
Executing commands in '/tmp/mono-gdb-commands.moTTS8'.
(lldb) process attach --pid 99253
Process 99253 stopped
* thread #1: tid = 0x3c6df4, 0x00007fff9758f582 libsystem_kernel.dylib`__wait4 + 10, name = 'tid_160b', queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
    frame #0: 0x00007fff9758f582 libsystem_kernel.dylib`__wait4 + 10
libsystem_kernel.dylib`__wait4:
->  0x7fff9758f582 <+10>: jae    0x7fff9758f58c            ; <+20>
    0x7fff9758f584 <+12>: movq   %rax, %rdi
    0x7fff9758f587 <+15>: jmp    0x7fff975897f2            ; cerror
    0x7fff9758f58c <+20>: retq

Executable module set to "/Users/gchj43576/Code/finch-client/ClientSource/MacMain/bin/Debug/FinchClient.app/Contents/MacOS/FinchClient".
Architecture set to: x86_64h-apple-macosx.
(lldb) thread list
Process 99253 stopped
* thread #1: tid = 0x3c6df4, 0x00007fff9758f582 libsystem_kernel.dylib`__wait4 + 10, name = 'tid_160b', queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
  thread #2: tid = 0x3c6e07, 0x00007fff9758fefa libsystem_kernel.dylib`kevent_qos + 10, queue = 'com.apple.libdispatch-manager'
  thread #3: tid = 0x3c6e08, 0x00007fff9758f5e2 libsystem_kernel.dylib`__workq_kernreturn + 10
  thread #4: tid = 0x3c6e0a, 0x00007fff9758edb6 libsystem_kernel.dylib`__psynch_cvwait + 10, name = 'SGen worker'
(lldb) thread backtrace all
* thread #1: tid = 0x3c6df4, 0x00007fff9758f582 libsystem_kernel.dylib`__wait4 + 10, name = 'tid_160b', queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
  * frame #0: 0x00007fff9758f582 libsystem_kernel.dylib`__wait4 + 10
    frame #1: 0x00000001032bcb91 FinchClient`mono_handle_native_sigsegv(signal=<unavailable>, ctx=<unavailable>, info=<unavailable>) + 433 at mini-exceptions.c:2427 [opt]
    frame #2: 0x00007fff89b1452a libsystem_platform.dylib`_sigtramp + 26
    frame #3: 0x00007fff9758ef07 libsystem_kernel.dylib`__pthread_kill + 11
    frame #4: 0x00007fff8ad0a4ec libsystem_pthread.dylib`pthread_kill + 90
    frame #5: 0x00007fff923cb6df libsystem_c.dylib`abort + 129
    frame #6: 0x0000000103451549 FinchClient`monoeg_log_default_handler(log_domain=<unavailable>, log_level=<unavailable>, message=<unavailable>, unused_data=<unavailable>) + 105 at goutput.c:233 [opt]
    frame #7: 0x0000000103451623 FinchClient`monoeg_g_log [inlined] monoeg_g_logv + 70 at goutput.c:113 [opt]
    frame #8: 0x00000001034515dd FinchClient`monoeg_g_log(log_domain=0x0000000000000000, log_level=G_LOG_LEVEL_ERROR, format=<unavailable>) + 141 at goutput.c:123 [opt]
    frame #9: 0x0000000103302901 FinchClient`mono_class_load_from_name(image=<unavailable>, name_space=<unavailable>, name=<unavailable>) + 145 at class.c:7974 [opt]
    frame #10: 0x000000010331889d FinchClient`mono_init_internal(filename="/Users/gchj43576/Code/finch-client/ClientSource/MacMain/bin/Debug/FinchClient.app/Contents/MonoBundle/FinchClient.exe", exe_filename=<unavailable>, runtime_version=<unavailable>) + 1805 at domain.c:710 [opt]
    frame #11: 0x00000001032cae50 FinchClient`mini_init(filename=<unavailable>, runtime_version=<unavailable>) + 944 at mini-runtime.c:3634 [opt]
    frame #12: 0x0000000103223dde FinchClient`mono_main(argc=4, argv=<unavailable>) + 4414 at driver.g.c:2039 [opt]
    frame #13: 0x00000001031caee4 FinchClient`::xamarin_main(argc=2, argv=0x00007fff5ca4e828, is_extension=false) + 980 at launcher.m:598
    frame #14: 0x00000001031cbbf4 FinchClient`main(argc=2, argv=0x00007fff5ca4e828) + 36 at launcher.m:609
    frame #15: 0x00007fff85a525ad libdyld.dylib`start + 1
    frame #16: 0x00007fff85a525ad libdyld.dylib`start + 1

  thread #2: tid = 0x3c6e07, 0x00007fff9758fefa libsystem_kernel.dylib`kevent_qos + 10, queue = 'com.apple.libdispatch-manager'
    frame #0: 0x00007fff9758fefa libsystem_kernel.dylib`kevent_qos + 10
    frame #1: 0x00007fff87e3c165 libdispatch.dylib`_dispatch_mgr_invoke + 216
    frame #2: 0x00007fff87e3bdcd libdispatch.dylib`_dispatch_mgr_thread + 52

  thread #3: tid = 0x3c6e08, 0x00007fff9758f5e2 libsystem_kernel.dylib`__workq_kernreturn + 10
    frame #0: 0x00007fff9758f5e2 libsystem_kernel.dylib`__workq_kernreturn + 10
    frame #1: 0x00007fff8ad07578 libsystem_pthread.dylib`_pthread_wqthread + 1283
    frame #2: 0x00007fff8ad05341 libsystem_pthread.dylib`start_wqthread + 13

  thread #4: tid = 0x3c6e0a, 0x00007fff9758edb6 libsystem_kernel.dylib`__psynch_cvwait + 10, name = 'SGen worker'
    frame #0: 0x00007fff9758edb6 libsystem_kernel.dylib`__psynch_cvwait + 10
    frame #1: 0x00007fff8ad08728 libsystem_pthread.dylib`_pthread_cond_wait + 767
    frame #2: 0x000000010341979c FinchClient`thread_func [inlined] mono_os_cond_wait(mutex=0x000000010352f780) + 15 at mono-os-mutex.h:107 [opt]
    frame #3: 0x000000010341978d FinchClient`thread_func(thread_data=0x0000000103990038) + 333 at sgen-thread-pool.c:110 [opt]
    frame #4: 0x00007fff8ad0799d libsystem_pthread.dylib`_pthread_body + 131
    frame #5: 0x00007fff8ad0791a libsystem_pthread.dylib`_pthread_start + 168
    frame #6: 0x00007fff8ad05351 libsystem_pthread.dylib`thread_start + 13
(lldb) detach

=================================================================
Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================

Process 99253 detached
(lldb)