frontend/src/utils/cronPreview.ts

@@ -89,6 +89,7 @@ function parseField(field: string, min: number, max: number): number[] | null {
     if (stepMatch) {
       const [, base, stepStr] = stepMatch;
       const step = parseInt(stepStr, 10);
+      if (step <= 0) return range(min, max);
       let start = min;
       let end = max;