Hi,
Please check community content in the following link: https://community.nxp.com/message/600009
Seems like there was a similar problem in this community thread and it was solved by choosing the following configuration when creating the project for the FXTH87: select S08->FXTH8700 Family> FXTH870000.
If this does not solve your case, I would recommend you to add the detailed issue you are facing (including screenshots of the error message) in that same community thread.