I tryed to download an update. And it all goes great until you get to wair the update has finished and NVDA restarts. I get the following error: Just started happening in the last two snapshots: Traceback (most recent call last):

 "installer.pyc", line 260, in _deleteKeyAndSubkeysWindowsError: [6](Error) The handle is invalid
Traceback (most recent call last):


 "/Users/tristan/dev/venv/bin/dbt", line 6, in <module>

exec(compile(open(__file__).read(), __file__, 'exec'))


 "/Users/tristan/dev/dbt/scripts/dbt", line 8, in <module>

dbt.main.main(sys.argv[1:])


 "/Users/tristan/dev/dbt/dbt/main.py", line 41, in main

handle(args)


 "/Users/tristan/dev/dbt/dbt/main.py", line 143, in handle

task.run()


 "/Users/tristan/dev/dbt/dbt/task/run.py", line 28, in run

graph_type = self.compile()


 "/Users/tristan/dev/dbt/dbt/task/run.py", line 20, in compile

results = compiler.compile(self.args.dry)


 "/Users/tristan/dev/dbt/dbt/compilation.py", line 399, in compile

written_schema_tests = self.compile_schema_tests(linker)


 "/Users/tristan/dev/dbt/dbt/compilation.py", line 324, in compile_schema_tests

schema_tests.extend(schema.compile()) # compiling a Schema
 returns >= 0 SchemaTest models


 "/Users/tristan/dev/dbt/dbt/model.py", line 556, in compile

for params in constraint_data:
TypeError: 'NoneType' object is not iterable
