STRINGLN supported?

One of my existing Duckyscripts uses STRINGLN to automate data entry isn’t working correctly. The Flipper is showing ERROR Line 4. The script runs correctly on an official Ducky.

Here’s the code up to that point. Is STRINGLN not supported?

DELAY 1000
CTRL t
DELAY 100
STRINGLN https://web.pulsepoint.org/

I may be incorrect as I am still really new to this but is that a ducky v1 command a ducky v3? I dont see stringln in the ducky v1 documentation. FZ only supports ducky v1 language.