How do I fix the pgvector "could not open extension control file" error?

The PostgreSQL extension pgvector sometimes returns the following error when you run the command CREATE EXTENSION pgvector;:

ERROR: could not open extension control file "/usr/pgsql-16/share/extension/pgvector.control": No such file or directory

This is because, despite the project being named pgvector, the creation command requires that you use vector as the extension name, like so:

 
CREATE EXTENSION vector; 

For more details, see the pgvector documentation.

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