Wrong again.
2 Timothy 3:14-17 But as for you, continue in what you have learned and have firmly believed, knowing from whom you learned it and how from childhood you have been acquainted with the sacred writings, which are able to make you wise for salvation through faith in Christ Jesus. All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness, that the man of God may be complete, equipped for every good work.
It's the "alone" part which is inserted from outside: it's an erroneous addition.
Even the word "complete" does not mean exhaustive or "sola." It means it's one of the things you need to make yourself complete.
By way of analogy, if I have a fully-provisioned backpack of supplies for a hike, and I have a canteen of water too, the water may be "profitable" and may make me "complete" but I still don't proceed on water ALONE: I believe in "aqua" but not in "Aqua Sola."
Therefore, brethren, stand fast, and hold the traditions which ye have been taught, whether by word, or our epistle."
2 Thessalonians 2:15
Protestant selective quoting of scripture. Y'all don't even read/know your own bibles.