When importing a new blade, you can choose to import a Blade structure file,to define the structural properties of the cross sections (see Blade database). All the offsets (i.e. the offset of the Elastic center, the Mass center and the Shear center) of the root element have to be 0.

If any of the offsets are not set to 0, you will get the following error message:

The error message tells you what are the offsets that were found to be non-zero. Simply set all the offsets to 0 to solve this issue.