Hello @mmehasebG95WT and welcome 
its hard to see your image, take a look here How to export a graph image [Correctly] , but it seems you use steamnodes that package havent been upgraded for year but should still work, just open the node and rename input as here…
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how i rename it and rename to what ?
Hi @mmehasebG95WT could you show a zoomed image so we are sure thats the issue ?
@sovitek is correct. The steamnodes is outdated and the input to the “Tool.CreateAssembly” node no longer works.