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Can preview PELA-technic-block when h greater than 1

Describe the bug

Loading file "PELA-technic-block.scad"
In Customizer Set: Technic Block -> h to everything greater 1

No block previewed, OpenSCAD Application freezes completely.

When [Edit] -> Preferences -> Advanced -> Settings -> OpenSCAD Language Features -> [v] Stop on the first waring
I see this WARNING with TRACE:

Loaded design '(...)PELA-blocks-master/PELA-technic-block.scad'.
Compiling design (CSG Tree generation)...
Compiling design (CSG Products generation)...
Geometries in cache: 38
Geometry cache size in bytes: 142432
CGAL Polyhedrons in cache: 5
CGAL cache size in bytes: 434560
Compiling design (CSG Products normalization)...
Normalized tree has 405 elements!
Compile and preview finished.
Total rendering time: 0:00:04.088
 
Parsing design (AST generation)...
Compiling design (CSG Tree generation)...
WARNING: undefined operation (number * undefined) in file style.scad, line 198
TRACE: called by 'block_height' in file PELA-block.scad, line 654
TRACE: called by 'for' in file PELA-block.scad, line 654
TRACE: called by 'if' in file PELA-block.scad, line 653
TRACE: called by 'skin' in file PELA-block.scad, line 220
TRACE: called by 'union' in file PELA-block.scad, line 219
TRACE: called by 'difference' in file PELA-block.scad, line 176
TRACE: called by 'block' in file PELA-block.scad, line 116
TRACE: called by 'difference' in file PELA-block.scad, line 115
TRACE: called by 'PELA_block' in file PELA-technic-block.scad, line 221
TRACE: called by 'union' in file PELA-technic-block.scad, line 220
TRACE: called by 'difference' in file PELA-technic-block.scad, line 219
TRACE: called by 'visual_cut_technic_block' in file PELA-technic-block.scad, line 181
Execution aborted

Expected behavior
A preview of a PELA-block.

Desktop (please complete the following information):