UPDATE (Solved)

I could not solve the stooq.pl issue (not finding Vix quotes)

The workaraund was.

Downloading VIX quotes using Download.c with mi IBKR broker connection and using these tickers:
VIX-IND-CBOE-USD (For VIX)
VXN-IND-CBOE-USD (For VXN)
RVX-IND-CBOE-USD (For RVX)