Issue With EXPDP Full Tablespace
Tracking Progress Within a Job

While the data and metadata are being transferred, a master table is
used to track the progress within a job.
...
The master table is created in the schema of the current user
performing the export or import operation. Therefore, that user must
have the CREATE TABLE system privilege and a sufficient tablespace
quota for creation of the master table.

So alter the user performing the export to have another default tablespace. That way the master table will be created in another tablespace.