doesn't 'run build' as downloaded

[bigbadbrad]

the error:
Creating an optimized production build ...
✓ Compiled successfully
Linting and checking validity of types ..Failed to compile.

./src/components/dashboard/layout/mobile-nav.tsx:88:27
Type error: Type 'string | null' is not assignable to type 'string'.
Type 'null' is not assignable to type 'string'.

86 | <Divider sx={{ borderColor: 'var(--mui-palette-neutral-700)' }} />
87 | <Box component="nav" sx={{ flex: '1 1 auto', p: '12px' }}>

88 | {renderNavItems({ pathname, items: navItems })}
| ^
89 |
90 | <Divider sx={{ borderColor: 'var(--mui-palette-neutral-700)' }} />
91 | <Stack spacing={2} sx={{ p: '12px' }}>