There cannot be more than one interpretation of the Bible. The word "truth" is used several times in the New Testament. However, the plural version of the word "truth" never appears in Scripture. Therefore, there can only be one Truth. So how can there be over 20,000 non-Catholic Christian denominations all claiming to have the "Truth" (i.e., the correct interpretation of the Bible)?
If one were to put two persons of the "same" non-Catholic Christian denomination (i.e., two Presybterians, two Lutherans, two Baptists, etc.) in separate rooms with a Bible and a notepad and ask them to write down their "interpretation" of the Bible, passage for passage, shouldn't they then produce the exact same interpretation? If guided by the Holy Spirit as Scripture states, the answer should be "Yes." But would that really happen? History has shown that the answer is "No." Now, in the case of Catholics, the Church which Christ founded and is with forever (Matthew 28:20) interprets the Bible, as guided by the Holy Spirit, (Mark 13:11) for the "sheep" (the faithful). The Church (not individuals) interpret Scripture. In Catholicism, Scripture is there for meditation, prayer and inspiration, not for individual interpretation to formulate doctrine or dogma.
There is but One Holy Spirit and still many people may view the same message/event and interpret what they see/hear differently.
There ... you have just confirmed it. In fact, private interpretation of the Bible is not condoned in the Bible Itself (2 Peter 1:20). Individual interpretation of Scripture was not practiced by the early Christians or the Jews (Acts 8:29-35).
There is only one Truth. Only God has a lock on it. The dark glass of sin obscures much of it from fallen man. I would be arrogant to claim I am perfect and infallible (probably even blasphemous), yet your church makes these claims despite its history of errors. Every hundred years or so it must have a new issuance of papal bulls, council edicts or Vatican conferences to try to restate or "clarify" obvious wrongs. I could point out some of these but what's the use? Your church does fancy footwork with words to "explain" it away rather than face what is plainly evident.