By this arrangement the Holy Spirit was showing that the way into the Most Holy Place had not yet been disclosed as long as the first tabernacle was still standing.
KJV
The Holy Ghost this signifying, that the way into the holiest of all was not yet made manifest, while as the first tabernacle was yet standing:
ASV
the Holy Spirit this signifying, that the way into the holy place hath not yet been made manifest, while the first tabernacle is yet standing;