Using shortest path pgr_dijkstra

Versions
PostGIS Bundle 3 for PostgreSQL x64 12
pgAdmin 4.24
pgrouting 3.1.0
I have also enabled the postgis and pgrouting extensions on a public schema.

I am only just starting with pgrouting so I am new to all the concepts. I am trying to follow a tutorial from pgrouting.org to find the shortest path between points on a network. I have created a table with their sample data and inserted the values. I have created the edge table using:

CREATE TABLE edge_table (
    id BIGSERIAL,
    dir character varying,
    source BIGINT,
    target BIGINT,
    cost FLOAT,
    reverse_cost FLOAT,
    capacity BIGINT,
    reverse_capacity BIGINT,
    category_id INTEGER,
    reverse_category_id INTEGER,
    x1 FLOAT,
    y1 FLOAT,
    x2 FLOAT,
    y2 FLOAT,
    the_geom geometry


INSERT INTO edge_table (
    category_id, reverse_category_id,
    cost, reverse_cost,
    capacity, reverse_capacity,
    x1, y1,
    x2, y2) VALUES
(3, 1,    1,  1,  80, 130,   2,   0,    2, 1),
(3, 2,   -1,  1,  -1, 100,   2,   1,    3, 1),
(2, 1,   -1,  1,  -1, 130,   3,   1,    4, 1),
(2, 4,    1,  1, 100,  50,   2,   1,    2, 2),
(1, 4,    1, -1, 130,  -1,   3,   1,    3, 2),
(4, 2,    1,  1,  50, 100,   0,   2,    1, 2),
(4, 1,    1,  1,  50, 130,   1,   2,    2, 2),
(2, 1,    1,  1, 100, 130,   2,   2,    3, 2),
(1, 3,    1,  1, 130,  80,   3,   2,    4, 2),
(1, 4,    1,  1, 130,  50,   2,   2,    2, 3),
(1, 2,    1, -1, 130,  -1,   3,   2,    3, 3),
(2, 3,    1, -1, 100,  -1,   2,   3,    3, 3),
(2, 4,    1, -1, 100,  -1,   3,   3,    4, 3),
(3, 1,    1,  1,  80, 130,   2,   3,    2, 4),
(3, 4,    1,  1,  80,  50,   4,   2,    4, 3),
(3, 3,    1,  1,  80,  80,   4,   1,    4, 2),
(1, 2,    1,  1, 130, 100,   0.5, 3.5,  1.999999999999,3.5),
(4, 1,    1,  1,  50, 130,   3.5, 2.3,  3.5,4);

At this point I have created the geometry using:

UPDATE edge_table SET the_geom = st_makeline(st_point(x1,y1),st_point(x2,y2))

After that I create some topology with :

SELECT pgr_createTopology('edge_table',0.001);

Then I try to use the pgr_dijkstra() function and it’s at this point the wheels come off.

The textbook I’m following gives the following input as an example:

SELECT pgr_dijkstra('SELECT id, source, target, cost FROM edge_table', 16,9,false,false);

But it throws this error.

ERROR:  function pgr_dijkstra(unknown, integer, integer, boolean, boolean) does not exist
LINE 1: SELECT pgr_dijkstra('SELECT id, source, target, cost FROM ed...
               ^
HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
SQL state: 42883
Character: 8

The table