Cannot read properties of null (reading 'replace')

Desktop Feedback Windows
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1

Kinda stuck here. Pulled down a workflow for LTX 2.3, installed the missing extensions/nodes, pulled down the missing models, but when I attempt to run the workflow, I get a red error message in the upper right that says:

Cannot read properties of null (reading ‘replace’)

Typically something like this would highlight a node or show me where in the workflow something is borked, but there’s no indication where the problem might be. Nothing in log file, either. Should I be looking somewhere else?

2

Same issue same situation, fixed by changing filename_prefix to something other than null in the VIdeo Combine node (found out by pressing F12 to open console and examining the detailed error message).