1) the protestant doctrine known as "sola scriptura"?
There are clear and direct Biblical teachings and prophecies and promises regarding the ongoing works, gifts, and power of the Holy Spirit in and through the entire church--as the living Body of Christ.
These are clearly delineated by Christ's example and His instructional impartations of the Holy Spirit in the Gospels, and later--permanently-- after Pentecost... in the book of Acts...
These are clearly constructed by Christ himself teaching the disciples to EXPECT the promise of the Father -- the beloved Holy Spirit (John 14-16)
-- And especially reminding us that all the manifest glory and power will be Christo-centric ( John 15:26)
None of these Biblcal teachings, examples, prophecies or fore-telling promises describe the appearances of Mary ( or anyone else), or the expectation of any miracles given as gifts or rewards for the testimony of her(/their) apparition.
(The holy angels remain active as messengers--commissioned only by God-- as we see in the book of Acts)
None of the promises tell us that glory will/should be given to Mary... or any one else... (Isaiah 42-44 are worth a look!)
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For your info & perspective--
Sola Scriptura is only the first of five pillars of sound doctrine: (as follows)
(1) Sola Scriptura: the Bible is the only inspired and authoritative word of God -- FIRST... FOREMOST... and FINAL
(2) Sola Fide: Salvation is by faith alone -- not by works (Eph 2:9-10)
(3) Sola Gratia: By grace alone -- the favor of God given to Christ-- and those found in Him
(4) Solo Christo: IN Christ alone... (Acts 4:12)
(5) Soli Gloria Deo: For God's glory alone--presently and ultimately
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