The Principle of Contingent Causation: The Impossibility of Infinite Regress.

[Angrboda]

Here is Wiki on Actual Infinity contrasted with Potential Infinity: "Actual infinity is to be contrasted with potential infinity, in which a non-terminating process (such as "add 1 to the previous number") produces a sequence with no last element, and where each individual result is finite and is achieved in a finite number of steps. As a result, potential infinity is often formalized using the concept of a limit."

Taken from: https://en.wikipedia.org/wiki/Actual_infinity

Funny, you left out the part where Wikipedia says, "Actual infinity is now commonly accepted." You've quoted a source as authoritative when that source refutes your position. Smooth move.