On the latest nightly I saw these errors. Unfortunately the ironic logs weren't gathered, but this error message is new to us:

 level=debug msg="The view function did not return a valid response. The return type must be a string, tuple, Response instance, or WSGI callable, but it was a dict.'"
level=debug msg="2020/08/06 16:43:47 [ERROR] module.masters: eval: *terraform.EvalApplyPost, err: could not inspect: could not inspect node, node is currently 'inspect failed', last error was 'Failed to inspect hardware. Reason: unable to start inspection: HttpException: 500: Server Error for url: http://172.22.0.2:5050/v1/introspection/ef6258b3-feea-438a-92c8-ccd3d94a5907?manage_boot=False, Internal server error (TypeError): 'dict' object is not callable"
level=debug msg="The view function did not return a valid response. The return type must be a string, tuple, Response instance, or WSGI callable, but it was a dict.'"
level=debug msg="2020/08/06 16:43:47 [ERROR] module.masters: eval: *terraform.EvalSequence, err: could not inspect: could not inspect node, node is currently 'inspect failed', last error was 'Failed to inspect hardware. Reason: unable to start inspection: HttpException: 500: Server Error for url: http://172.22.0.2:5050/v1/introspection/ef6258b3-feea-438a-92c8-ccd3d94a5907?manage_boot=False, Internal server error (TypeError): 'dict' object is not callable"
level=debug msg="The view function did not return a valid response. The return type must be a string, tuple, Response instance, or WSGI callable, but it was a dict.'"
level=error
level=error msg="Error: could not inspect: could not inspect node, node is currently 'inspect failed', last error was 'Failed to inspect hardware. Reason: unable to start inspection: HttpException: 500: Server Error for url: http://172.22.0.2:5050/v1/introspection/8fd6cdba-aed1-494b-85ca-fd2e44019629?manage_boot=False, Internal server error (TypeError): 'dict' object is not callable"
level=error msg="The view function did not return a valid response. The return type must be a string, tuple, Response instance, or WSGI callable, but it was a dict.'"
level=error
level=error msg="  on ../../tmp/openshift-install-455674588/masters/main.tf line 1, in resource \"ironic_node_v1\" \"openshift-master-host\":"
level=error msg="   1: resource \"ironic_node_v1\" \"openshift-master-host\" {"
level=error
level=error
level=error
level=error msg="Error: could not inspect: could not inspect node, node is currently 'inspect failed', last error was 'Failed to inspect hardware. Reason: unable to start inspection: HttpException: 500: Server Error for url: http://172.22.0.2:5050/v1/introspection/c0028cc5-7008-45c5-a0f7-f2c8067b7c38?manage_boot=False, Internal server error (TypeError): 'dict' object is not callable"
level=error msg="The view function did not return a valid response. The return type must be a string, tuple, Response instance, or WSGI callable, but it was a dict.'"
level=error
level=error msg="  on ../../tmp/openshift-install-455674588/masters/main.tf line 1, in resource \"ironic_node_v1\" \"openshift-master-host\":"
level=error msg="   1: resource \"ironic_node_v1\" \"openshift-master-host\" {"