[Trac] Trac error: upgrade of trac.db.api.DatabaseManager: Unsupported database type "postgres"

Hi,

Suddenly I get this message from Trac:

"Trac Error

TracError: Unable to check for upgrade of trac.db.api.DatabaseManager:
TracError: Unsupported database type "postgres"

The trac.log-file says:

2025-02-17 09:04:58,282 Trac[env] INFO: -------------------------------
- environment startup [Trac 1.6] --------------------------------
2025-02-17 09:04:58,589 Trac[postgres_backend] WARNING: Exception
caught while retrieving libpq's version
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/trac/db/postgres_backend.py",
line 299, in _client_version
    lib = ctypes.CDLL(_libpq_pathname)
  File "/usr/lib/python3.13/ctypes/__init__.py", line 353, in __init__
    if name.endswith(".fwork"):
       ~~~~~~~~~~~~~^^^^^^^^^^
TypeError: endswith first arg must be bytes or a tuple of bytes, not
str

Anyone an idea about a solution? 

TIA,

Gr

Joost

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