The Opening (of a Knot)
Scholars have said that seeing the opening of a knot or something closed signifies relief and the easing of matters. If someone else opens it, the relief will come from an external cause. If the dreamer opens it after effort, they will attain salvation after hardship. However, if the knot opens by itself, it may be interpreted that God will grant relief from an unexpected source.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.