WiFi issues

Greeting everyone.
Recently, I got new internet / modem and now I can't connect my LG-G5 to WiFi.
Here's what happens.
No matter what WiFi I chose from my modem (had two versions 2.4g and 5g) and when i connect to one or the other, the lg-g5 is stuck in a continuous loop of connection, disconnection, connection, disconnection. It disconnects 1 second after it connects. Sometimes it even provides this message "Internet unavailable with 0x" or something along those lines. Any help??? I've...

WiFi issues

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