Make pg_ivm work under Percona PostgreSQL 15.2

Hello,

I complied this extension https://github.com/sraoss/pg_ivm for Percona PostgreSQL 15.2 but it is not working.

I get the following error

SQL Error [42883]: ERROR: function create_immv(unknown, unknown) does not exist
Hint: No function matches the given name and argument types. You might need to add explicit type casts.
Position: 8

Any help?