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-rw-r--r--caldav/objects.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/caldav/objects.py b/caldav/objects.py
index 707c476..02a6ae2 100644
--- a/caldav/objects.py
+++ b/caldav/objects.py
@@ -966,7 +966,7 @@ class Calendar(DAVObject):
except error.NotFoundError:
raise
except Exception as err:
- raise NotImplementedError(f"Server said {str(err)}. The object_by_uid is not compatible with some server implementations. work in progress.")
+ raise NotImplementedError("Server said %s. The object_by_uid is not compatible with some server implementations. work in progress." % {str(err)})
# Ref Lucas Verney, we've actually done a substring search, if the
# uid given in the query is short (i.e. just "0") we're likely to