Exception after installing Costum_nodes/Workflow-Component

[fifthinvent]

Hello everybody, after installing the 'new_ComfyUI_windows_portable_nvidia_cu121_or_cpu' and costum_nodes/Workflow-Component it raised an exception in /ComfyUI_windows_portable/ComfyUI/custom_nodes/ComfyUI-Workflow-Component/workflow_component/component_loader.py. >> Exception: ### [ERROR] "DF_Multiply" node is not installed. Please install that node through ComfyUI-Mananger. ### <<, please see below.
I have found the class "DF_Multiply" in sdxl-ksample.json file. KSampler(Advanced) - node is installed and seems to be ok.
But i can't find or install the DF_Multiply - node.
(Is that maybe an issue not to be worth of mentioning, that will be solved within a further update?
Btw, does DF means data-frame? What is the node's use?)

Best regards
"I'm very happy about such an amazing open source project, to bring AI into our homes. Thank you all for your work!"

line 209, in get_input_types_dynamic

build_input_types(i, input_mapping, input_types, node, node_config_map, spec_map)
   --> [Workflow-Component] '## sdxl-ksample [f14d94]' is broken. Maybe there are missing nodes. (INFO: ### [ERROR] "DF_Multiply" node is not installed. Please install that node through ComfyUI-Mananger. ###) <--

line 357, in build_input_types

raise Exception(errmsg)
 Exception: ### [ERROR] "DF_Multiply" node is not installed. Please install that node through ComfyUI-Mananger. ###