Time Machine error: can't start the backup

I have the same problem. Here's part of the report; the rest in additional text:

EtreCheckPro version: 6.8.3 (68032)

Report generated: 2023-11-13 20:26:35

Download EtreCheckPro from https://etrecheck.com

Runtime: 1:53

Performance: Excellent

Problem: Other problem

Description:

backups to time machine fail. Error message says antivirus software ma

y be preventing time machine from writing to the backup disk.

Major Issues:

    Anything that appears on this list needs immediate attention.

    Kernel panics - This system has experienced kernel panics. This could be a sign of hardware failure.

    Heavy CPU usage - Some processes are using an unusually high amount of CPU.

Minor Issues:

    These issues do not need immediate attention but they may indicate future problems or opportunities for improvement.

    Apps with heavy CPU usage - There have been numerous cases of apps with heavy CPU usage.

    Clean up - There are orphan files that could be removed.

    Unsigned files - There are unsigned software files installed. These files could be old, incompatible, and cause problems. They should be reviewed.

    Runaway user process - A user process is using a large percentage of your CPU.

    Limited permissions - More information may be available with Full Disk Access.

    Kernel extensions present - This computer has kernel extensions that may not work in the future.

Hardware Information:

    Mac mini (M1, 2020)

        Status: Supported

    Mac mini Model: Macmini9,1

    2.40 GHz Apple M1 (m1) CPU: 8-core

    8 GB RAM - Not upgradeable

Run the third party app EtreCheck and post the report here so we can see if the report contains any clues to the problem.