I encountered the error "Experts initializing of ????(ETHUSD,M15) failed with code 32767 (incorrect parameters)" when running mql5.

 
Hello everyone.

I encountered the error "Experts initializing of ????(ETHUSD,M15) failed with code 32767 (incorrect parameters)" when running mql5.

The program code that seems to have caused the error is "double min_volume=SymbolInfoDouble(Symbol(),SYMBOL_VOLUME_MIN);" and it occurred with the ETHUSD, LTCUSD, and BCHUSD brands on the FXGT exchange.

Has anyone encountered the same problem?
Is there anyone else who has solved the problem?

Thank you.