WD doesn't load scheme with script element

1. Create the following scheme in WD:
"Read Sequence" -> "Dump Sequence Info" -> "Write Plain Text".
2. Save it somewhere using the "Save as..." action.
3. Close WD.
4. Reopen the scheme's file.
Current state: empty WD scene opens, the error message
"[ERROR] Info element undefined in visual block
[ERROR] Expected '}', got pos"
appears in log.
Expected result: scheme is loaded completely.