Too many communication errors?

Hi, I would like to know how to fix this.
I can't get into my ecu where I did before.
It reads the first numbers , sometimes the second set, but not all anymore. Messaging me "too many communication errors to continue"
Help

I think I fixed it last time with adaption of the immo then access is given so I adaption the engine to immo.
I can't find threads on the subject that solves why it is.
Making sure it earthed is another...
It works but won't let me in
Help

The only added thing to mention is somehow the leads to the distributor somehow got mixed up and operated the vehical ,would that have something to electrical disturbance?
The vw dealer has looked at it ...and doesn't know either.
I don't either.
You obviously don't know.

I know, I'll start again.
My t4 transporter started sounding like it had fuel contamination when I left the fuel station. The vw specialist says the leads were the wrong way round???
I used vcds lite reg. And it won't let me read it, or for the vw guy.
He is going to do the cam timings later and we all don't now anything.
Does it help you in your answer?
Thanks