ipad Air 2 update to iOS 13 problem

This all started with an iPad Air 2 functioning normally running IOS 12.

I updated my iPad to iOS 13.

I did this while the iPad was plugged into my iMac which is running Mojave 10.14.6 with an up to date iTunes.

The update appeared to go normally.

After iOS launched everything looks normal BUT there are problems.

The first problem is that after the iPad booted up under iOS 13 it could no longer talk to iTunes.

"iTunes could not connect to the device because an error occurred while reading from the device".

The cable is fine and other devices have no problem connecting using that same cable.

The second problem is the iPad cannot connect to my network.

The iPad can see the available networks and ask me to join - but always fails after i enter the password.

(as if I was using the wrong password).

My router is up to date with the latest bios and I have the correct password and all my other apple devices can join and function normally over this network.

The third problem is the iPad cannot successfully connect to another device using bluetooth.

It can see other devices and go through the normal steps of connection but in the end it always fails to make the connection.

So in an attempt to fix this I put the iPad into "recovery mode" and connected it to iTunes.

In recovery mode it will connect to iTunes and iTunes then offers me the option to restore or update.

I have tried both of those options.

The system was reinstalled - fresh.

But this has not resolved the problems described above.

There were no signs of trouble on the iPad before the update to 13.

So I have now run out of ideas.

I performed regular backups with my iPad.

However I cannot (or do not know how to) connect to iTunes in a way that gives me the option to restore.

Nasty problem.