Timemachine not recognising My Cloud Ex 2 Ultra

My Cloud OS 3 Personal & Network Attached Storage My Cloud EX2
1

I have a My Cloud Ex 2 Ultra which has worked as the backup for my Mac without issue until the end of March 24.
Now Time Machine says it cant find the backup server - " Time Machine couldn’t complete the backup to “TimeMachineBackup” The backup disk image “MacBook Pro (2).sparsebundle” could not be accessed (error 19)."
The disc appears in the finder window and can be opened, but will not connect to Time Machine .
Any suggestions?

2

Hi @A_D22
Have you opened a Support Case? If not opened, for more information, please contact the WD Technical Support team for the best assistance and troubleshooting: