Why my phones cant detect SSID?

Kanina okay pa yung wifi. But nung pag uwi namin all phones cant detect SSID. androids and iphones.

2.4g may ilaw pero 5g parang almost 5 months na din di nagagamit since may problem din. Pero kanina 2.4 g ayaw na din ma detect yung SSID pero sa PC thru lan ethernet meron.

Any tips how to fix?