When trying to set a user's default project via WSAPI, the following error is seen in the response:
Validation error: User.profile.defaultProject /project/<PROJECT_OID> is an invalid value
Release : SAAS
Component :
This can be caused when trying to set a default project that the user does not already have access to.
First ensure that the user has access to the target project prior to making the update to the users DefaultProject