You Do Need power plug adapter while traveling from Bolivia to Western Sahara.

Here is Why You Need An Adapter

The outlet and plug type used in Western Sahara are C and E and in Bolivia are A and C. This is how they look like.

Bolivia

In Bolivia, outlets of type A and C are in use.

Type A

Type C

Western Sahara

In Western Sahara, outlets of type C and E are in use.

Type C

Type E