User @timon816 last visited the forum in August 2020, so well over two and a half years ago.
Since then Blynk IoT has been introduced and Blynk legacy retired, so the blynk.cloud.com server url has been replaced by blynk.cloud and there have been many other significant changes to the Blynk libraries.
Even if @timon816 has his code from two and a half years ago, it won’t work with Blynk IoT.
I think you’d be better starting a new topic about your problem, but before you do that you should read this…
New topics that are created without sufficient information will be removed.
Pete.