No Time Machine backups b/c "sparsebundle not accessible"
My Time Machine backups worked absolutely flawless (using a WD MyCloud with LAN connection to the iMac) with hourly updates until two days ago where I got the following message:
"Time Machine could not complete the backup to "TimeMachineBackup". The image of the backup volume "iMac2.sparsebundle" could not be accessed (error 19)."
What does that mean, what is error 19? Why is it not accessible? And most important: What can I do now to get access again?!
Big Thanks for any helpful advice!!
iMac 27″, macOS 13.1