Acts 17
11 Now these were more noble-minded than those in Thessalonica, for they received the word with great eagerness,
examining the Scriptures daily to see IF these things were so.
Mark 7
7 Howbeit in vain do they worship me, teaching for doctrines the commandments of men.
8 For
laying aside the Commandment of God, ye hold the tradition of men, as the washing of pots and cups: and many other such like things ye do.
9 And he said unto them, Full well
ye reject the commandment of God, that ye may keep your own tradition.
10 For
Moses said, Honour thy father and thy mother; and, Whoso curseth father or mother, let him die the death:
11 But ye say, If a man shall say to his father or mother, It is Corban, that is to say, a gift, by whatsoever thou mightest be profited by me; he shall be free.
12 And ye suffer him no more to do ought for his father or his mother;
13
Making the Word of God of none effect
through your tradition, which ye have delivered: and many such like things do ye.
No doubt one Magisterium was replaced by another - but the model/pattern/example we have from Christ remains the same - he hammered the traditions of the one true church (nation church in his case) started by God - and he did so "sola scriptura".
Bereans went totally against what their magisterium told them to do - by testing the teaching of Paul "sola scriptura" and then making the switch. This is the only method that works across denominations. "To see IF those things were so" means testing Paul - not blindly swallowing.
And yes in the case of Mark 7:6-13 nothing at all other than written Word of God was appealed to by Christ - so while not denying all the other ways that God speaks other than what had already been written at the time of Christ - He did appeal to scripture alone to hammer the Magisterium.
Traditions, doctrines, practices that pass the test of scripture - are not error.