In the browser address bar, search for a trusted FRP bypass website (such as vnrom.net/bypass or addrom.com ).
This indicates that the Android security patch on your LG X4 is too new for the tool or exploit you are using. You may need to look for an updated version of the software or flash an older version of the official LG stock firmware (downgrading) before running the tool. lg x4 frp bypass unlock tool
Recent versions of SamFirm (ironically named for Samsung) include LG X4 support. You install the APK on an already working Android phone, connect the locked LG X4 via an OTG cable, and initiate a "Remote FRP Removal." In the browser address bar, search for a