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:
Berean Study Bible (BSB) - Hebrews 9:8 >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.
Textus Receptus (TR) - Hebrews 9:8 >τοῦτο δηλοῦντος τοῦ πνεύματος τοῦ ἁγίου, μήπω πεφανερῶσθαι τὴν τῶν ἁγίων ὁδόν, ἔτι τῆς πρώτης σκηνῆς ἐχούσης στάσιν·