Failed to find the parent content type ID

If you have created a content type id by appending GUID to the parent type id as follows:

0x010801FBE5603FF6FD4ae3878BFC1D597E826C

and facing the error

Failed to find the parent content type ID="ct-1033-0x010801.......",

then here is the Solution:

append two zeros to the parent type id before adding the new GUID as follows

0x01080100FBE5603FF6FD4ae3878BFC1D597E826C

This should solve it!