Time Capsule and Big Sur Not Working

I have a MacBook Air, just updated to Big Sur. Since that time, have been unable to backup to a TimeCapsule Disk (AirPort Extreme with USB Disk), with the console log listed below. Two other Catalina laptops continue to backup without issue. Have formatted the disk, and checked multiple times that the "ignore disk permissions" flag is set. Furthermore, can create folders and copy files to the networked disk from the Big Sur MacBook without issue. Thanks for any help.

default 05:29:48.720909-0500 distnoted register name: com.apple.backup.prefschanged object: com.apple.backupd token: f600000093 pid: 418

default 05:29:48.789993-0500 TMHelperAgent CHECKIN: pid=17644

default 05:29:48.790572-0500 TMHelperAgent Received configuration update from daemon (initial)

default 05:29:48.804481-0500 TMHelperAgent CHECKEDIN: pid=17644 asn=0x0-0x12e12e foreground=0

default 05:29:48.816975-0500 tccd AUTHREQ_ATTRIBUTION: msgID=17644.1, attribution={requesting={identifier=com.apple.TMHelperAgent, pid=17644, auid=502, euid=502, binary_path=/System/Library/CoreServices/backupd.bundle/Contents/Resources/TMHelperAgent.app/Contents/MacOS/TMHelperAgent}, },

default 05:29:48.828061-0500 tccd -[TCCDAccessIdentity staticCode]: static code for: identifier com.apple.TMHelperAgent, type: 0: 0x7fdd96f4b190 at /System/Library/CoreServices/backupd.bundle/Contents/Resources/TMHelperAgent.app

default 05:29:48.849694-0500 tccd AUTHREQ_ATTRIBUTION: msgID=138.289, attribution={accessing={identifier=com.apple.TMHelperAgent, pid=17644, auid=502, euid=502, binary_path=/System/Library/CoreServices/backupd.bundle/Contents/Resources/TMHelperAgent.app/Contents/MacOS/TMHelperAgent}, requesting={identifier=com.apple.WindowServer, pid=138, auid=88, euid=88, binary_path=/System/Library/PrivateFrameworks/SkyLight.framework/Versions/A/Resources/WindowServer}, },

default 05:29:48.849792-0500 tccd requestor: identifier=com.apple.WindowServer, pid=138, auid=88, euid=88, binary_path=/System/Library/PrivateFrameworks/SkyLight.framework/Versions/A/Resources/WindowServer is checking access for accessor identifier=com.apple.TMHelperAgent, pid=17644, auid=502, euid=502, binary_path=/System/Library/CoreServices/backupd.bundle/Contents/Resources/TMHelperAgent.app/Contents/MacOS/TMHelperAgent

default 05:29:48.856221-0500 tccd -[TCCDAccessIdentity staticCode]: static code for: identifier com.apple.TMHelperAgent, type: 0: 0x7fdd96e45010 at /System/Library/CoreServices/backupd.bundle/Contents/Resources/TMHelperAgent.app

default 05:29:48.874062-0500 TMHelperAgent FRONTLOGGING: version 1

default 05:29:48.874140-0500 TMHelperAgent Registered, pid=17644 ASN=0x0,0x12e12e

default 05:29:48.877706-0500 TMHelperAgent BringForward: pid=17644 asn=0x0-0x12e12e bringForward=0 foreground=0 uiElement=1 launchedByLS=0 modifiersCount=0 allDisabled=0

default 05:29:48.878844-0500 TMHelperAgent Current system appearance, (HLTB: 2), (SLS: 1)

default 05:29:48.887088-0500 TMHelperAgent Post-registration system appearance: (HLTB: 2)

default 05:29:48.936536-0500 TMHelperAgent Registering for test daemon availability notify post.

default 05:29:48.936742-0500 TMHelperAgent notify_get_state check indicated test daemon not ready.

default 05:29:48.950058-0500 TMHelperAgent SignalReady: pid=17644 asn=0x0-0x12e12e

default 05:29:48.950892-0500 TMHelperAgent SIGNAL: pid=17644 asn=0x0x-0x1237294

default 05:29:48.996505-0500 tccd -[TCCDAccessIdentity staticCode]: static code for: identifier com.apple.TMHelperAgent, type: 0: 0x7fdd96f47e20 at /System/Library/CoreServices/backupd.bundle/Contents/Resources/TMHelperAgent.app

default 05:29:49.179874-0500 NetAuthSysAgent Mount URL: request 1C0EA72C-B1DD-4180-8E61-BBE261602AB7 from backupd (3947)

default 05:29:50.438832-0500 distnoted register name: com.apple.backup.prefschanged object: com.apple.backupd token: f700000093 pid: 418

default 05:29:51.708492-0500 distnoted register name: com.apple.backup.prefschanged object: com.apple.backupd token: f800000093 pid: 418

default 05:29:51.824554-0500 backupd Connecting to hdiejectd

default 05:29:51.838769-0500 backupd Connected successfully

error 05:29:55.589576-0500 backupd Failed to create '/Volumes/.timemachine/Office._afpovertcp._tcp.local./02BC6099-00EB-4A3C-A3F6-395F04216900/Air Disk/310F22CC-79BD-551E-8169-2A9D2B3148F0.sparsebundle', results: {

}, error: 19 Operation not supported by device

error 05:29:57.140791-0500 backupd Backup failed (20: BACKUP_FAILED_DISK_IMAGE_NOT_CREATED)