File '/mnt/ngswork/galaxy/galaxy-dist/lib/galaxy/webapps/galaxy/controllers/workflow.py', line 202 in display_by_username_and_slug
return self.display(trans, stored_workflow)
File '/mnt/ngswork/galaxy/galaxy-dist/lib/galaxy/webapps/galaxy/controllers/workflow.py', line 218 in display
self.get_stored_workflow_steps( trans, stored_workflow )
File '/mnt/ngswork/galaxy/galaxy-dist/lib/galaxy/web/base/controller.py', line 668 in get_stored_workflow_steps
module = module_factory.from_workflow_step( trans, step )
File '/mnt/ngswork/galaxy/galaxy-dist/lib/galaxy/workflow/modules.py', line 402 in from_workflow_step
return self.module_types[type].from_workflow_step( trans, step )
File '/mnt/ngswork/galaxy/galaxy-dist/lib/galaxy/workflow/modules.py', line 217 in from_workflow_step
module.state.inputs = module.tool.params_from_strings( step.tool_inputs, trans.app, ignore_errors=True )
File '/mnt/ngswork/galaxy/galaxy-dist/lib/galaxy/tools/__init__.py', line 2120 in params_from_strings
return params_from_strings( self.inputs, params, app, ignore_errors )
File '/mnt/ngswork/galaxy/galaxy-dist/lib/galaxy/tools/parameters/__init__.py', line 94 in params_from_strings
value = params[key].value_from_basic( value, app, ignore_errors )
File '/mnt/ngswork/galaxy/galaxy-dist/lib/galaxy/tools/parameters/grouping.py', line 444 in value_from_basic
current_case = rval['__current_case__'] = value['__current_case__']
TypeError: 'NoneType' object is unsubscriptable