[BUG] org-agenda column view error: wrong type markerp, nil [9.6.9 ( @ /path/to/org-9.6.9/)]

-darwin18.7.0, NS appkit-1671.60 Version 10.14.6 (Build 18G95)) of 2023-02-22 Package: Org mode version 9.6.9 ( @ /path/to/org-9.6.9/) -- John Borwick

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x-uw-ex-currentlocation-365-recipient: Outside x-microsoft-exchange-diagnostics: =?utf-8?B?MTtDWTFQUjA4MDFNQjIyOTc7MjM6UmJFcDdTR0wvNHBPcjhVcWNXZGtLdXdm?= =?utf-8?B?S2ROdDl5VjFIaGhuQTh3TGFIa253Y0NBc3ZxRUhPYWVrRVd4ZWc0ZXJxbjM3?=

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x-uw-ex-currentlocation-365-recipient: Outside x-microsoft-exchange-diagnostics: =?utf-8?B?MTtDWTFQUjA4MDFNQjIzNDU7MjM6RWNydHRFUEVySG53U0M3N0JRWXROWG1V?= =?utf-8?B?MXZta0l2a21vQkhTZng3MUUxZzJjZm1XVG4rc05UckR2MTlxVFJyZUV1S2lW?=

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x-uw-ex-currentlocation-365-recipient: Outside x-microsoft-exchange-diagnostics: =?utf-8?B?MTtDWTFQUjA4MDFNQjIxNTY7MjM6U0MySWlETVUrV1g5UTRjNEc1UWlodGRu?= =?utf-8?B?NkJDNW53ZHJzNHhpNCs0aXc1NklhK0xoWlgxSU5kMjdsZUlTcGVxY3dYc0c5?=