You have this formula in V4 of "Stressed Case Cashflow" sheet.

=$F$4/4 & IF(V2>$D$4, V4=0, "") & IF(V2>$E$4, V4=0, "") & IF(V4=0, W4:Z4="VOID") & IF(R4:U4="VOID", V4=T4, "")

This has circular reference because you are referencing V4 in it's own formula.
Also, in the IF statement after the condition is met you need to have two results [for True or False]. Instead you have comparison statements.

Please fix these formulas or explain the logic you want to use and someone will suggest correct formula.

Part of the formula in V4:
IF(V2>$E$4, V4=0, "") could be fixed as IF(V2>$E$4,0,"")