Attempting To Connect Tablet - Access Point Temporarily Full

[#1]

I'm attempting to re-connect an Android tablet but it won't connect and I'm receiving the message Access Point Temporarily Full.  It's a tablet that has previously been connected OK and even earlier today was working OK.  Does anyone have any suggestions please? 

[#2]

That's caused by the router failing to allocate an IP address.

What make/model of router are you using ?

[#3]

It's a Plusnet router but I can't see a model number on it.

[#4]

A quick Google and it looks like it's a Hub Zero.  It looks like this.

[#5]

Ah! How many other devices do you have connected ?

I believe the Hub Zero has a limit on the number of devices , 12 rings a bell but I'm not sure...

[#6]

In total, quite a few, 12 or more could be possible, but actually in use at the moment, probably about six or seven that I'm aware of - three mobile phones, two laptops, a printer and the tablet that we're trying to re-connect.  I'm going to try switching some of them off now to see if that helps.

[#7]

It may take the router a while to lose the DHCP allocation for a device that you turn off, so you may not be able to connect another immediately

[#8]

I don't know if/where the control is on a Hub Zero, I would guess in the advanced network setings but presumably selecting 'Renew Lease' (assuming it has the option) would clear out the unused stuff?

[#9]

@CymruToon - almost certainly due to the hardware limitation on number of devices a Hub Zero will allow you to associate simultaneously.

I've arranged dispatch of a more recent router that should resolve the issue.

[#10]

Thank you everyone for your help.  Switching off some devices did work but hopefully the new router will be a better solution.  Thatnks again.