Could not open extension control file citext.control - python-3.x

Question

Environment(s)
Ubuntu 20.04 & Debian 10 with Python 3.8 or 3.7, respectively.
Postgresql versions 11, 12, and 14 have been tried.
Psycopg2-binary 2.8.6
Overview
I'm attempting to install a Django project, and I'm getting this error:
psycopg2.errors.UndefinedFile: could not open extension control file "/usr/share/pgsql/extension/citext.control": No such file or directory
The psycopg devs informed me this is likely an issue with the postgresql-contrib libraries. Similarly, others have been able to fix this error by installing postgresql-contrib, however, this does not work for me. I've also tried installing postgresql-12.
I can see that citext.control is available in /usr/share/postgresql/12/extension/citext.control, so I tried ln -s /usr/share/postgresql/12 /usr/share/pgsql with no effect.
I also ran CREATE EXTENSION citext; in Postgres, also without effect.
Any support with this would be greatly appreciated, as I was hoping to have this project live already!
Thanks so much.
Trace
Running migrations:
Applying core.0043_install_ci_extension_pg...Traceback (most recent call last):
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
psycopg2.errors.UndefinedFile: could not open extension control file "/usr/share/pgsql/extension/citext.control": No such file or directory
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 16, in <module>
execute_from_command_line(sys.argv)
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
utility.execute()
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/core/management/__init__.py", line 356, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/core/management/base.py", line 283, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/core/management/base.py", line 330, in execute
output = self.handle(*args, **options)
File "/home/user/janeway/src/utils/management/commands/install_janeway.py", line 58, in handle
call_command('migrate')
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/core/management/__init__.py", line 131, in call_command
return command.execute(*args, **defaults)
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/core/management/base.py", line 330, in execute
output = self.handle(*args, **options)
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/core/management/commands/migrate.py", line 202, in handle
post_migrate_state = executor.migrate(
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/db/migrations/executor.py", line 115, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/db/migrations/executor.py", line 145, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/db/migrations/executor.py", line 244, in apply_migration
state = migration.apply(state, schema_editor)
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/db/migrations/migration.py", line 129, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/contrib/postgres/operations.py", line 17, in database_forwards
schema_editor.execute("CREATE EXTENSION IF NOT EXISTS %s" % schema_editor.quote_name(self.name))
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/db/backends/base/schema.py", line 136, in execute
cursor.execute(sql, params)
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/db/utils.py", line 94, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/utils/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "/home/user/venvs/janeway/lib/python3.8/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
django.db.utils.OperationalError: could not open extension control file "/usr/share/pgsql/extension/citext.control": No such file or directory

Answer 1

Have you tried installing python3-psycopg2 from the packaging system instead?
My Ubuntu 20 setup has this installed, and postgresql connections work with django.
ii python3-psycopg2 2.8.4-2 amd64 Python 3 module for PostgreSQL

Answer 2

I had installed postgresql-contrib on the local django server rather than the remote DB server. Installing on the same server as Postgresql resolved the issue.