Try to figure out why the connection is broken.
If the Ps4 connected via wlan - Router still 345 Silver Wolf.
If I get a mobil Hotspot running, Ps4 via WLAN - mobil Hotspot
Via mobil Hotspot it runs.
Notebook as Hotspot same network runs too.
Didn't get why the Ps4 can't connect through direct wlan connection through router...
This morning still worked...