Error Message:

VxVM vxdg ERROR V-5-1-10978 Disk group testdg: import failed:
Disk group has no valid configuration copies

Due to diskgroup created in higher version the lower version of volume manager will not be able to import the Diskgroup

Example :

Checking on source server the DG is created with version 280
root# vxdg list testdg | grep -i version
version:   280

However on destination the maximum dg version which is supported is 180.
root# vxdctl support
Support information:
  vxconfigd_vrsn:   34
  dg_minimum:       20
  dg_maximum:       180
  kernel:           33
  protocol_minimum: 90
  protocol_maximum: 120
  protocol_current: 0

Suggested customer to either do this testing in a supported version of vxvm to achieve  this or customer may need to recreate DG on destination side along with filesystem and moving the data is the only option.