Wifi connection via Mac issue, shows 255.255.255.255

I am setting up my workbee for the first time. I followed steps for setting up wifi via Mac and have had a few issues.

1. Firstly "step 2", sending M587 S"your-network-name" P"your-password" (with name and password substituted never returns an OK.
2. Continuing through the steps throws up this message: M552
   WiFi module is connected to access point , IP address 255.255.255.255
   ok. A green light comes on between the wifi antenna and SD card. However I cannot connect to the workbee through my browser (255.255.255.255 is not useful).

Please can you help?

Thanks

Incase it is useful here are some extra bits of info:

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RepRapFirmware for Duet 2 WiFi/Ethernet version 3.3

Executing config.g… HTTP is enabled on port 80

FTP is disabled

TELNET is disabled

Warning: Macro file config-override.g not found

Done!

RepRapFirmware for Duet 2 WiFi/Ethernet is up and running.

WiFi module started

WiFi reported error: Unexpected WiFi state ‘idlM552

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M408 S5

{"axisMins":[0.00,0.00,0.00],"axisMaxes":[270.00,270.00,88.00],"accelerations":[150.00,150.00,150.00,150.00,500.00,500.00,500.00,500.00,500.00,500.00,250.00,250.00],"currents":[2400,2400,2400,2400,0,0,0,0,0,0,0,0],"firmwareElectronics":"Duet WiFi 1.02 or later","firmwareName":"RepRapFirmware for Duet 2 WiFi/Ethernet","firmwareVersion":"3.3","dwsVersion":"1.26","firmwareDate":"2021-06-15", "sysdir":"0:/sys/","idleCurrentFactor":100.0,"idleTimeout":30.0,"minFeedrates":[8.33,8.33,8.33,8.33,15.00,15.00,15.00,15.00,15.00,15.00,2.00,2.00],"maxFeedrates":[41.67,41.67,41.67,41.67,100.00,100.00,100.00,100.00,100.00,100.00,20.00,20.00]}