Hi,
sorry to border you again.
I did contact you before via contact form from trainingmitsystem@gmail.com a couple days before about the issue on my website.
Today I have found something. As I was looking to find the error I found out that I couldn't find the VirtueMart System Plugin and I think this needs to be there.

I also want to know you that I was contacting you over the joomla service form to get the service from you and I'm willing to pay for it. Just let me kow if you can take care on the issue and about the price, if it is related to the missing plugin or not and when do you think you can start to work on it since I need to know to continue to work with the website.
I rather spend the money on you I know and I trust ( since you helped before with the invoice issue) then on someone else
.
I did send you my login details.

Here the details I send you before about the error.

I tried several thing, using another template, without captcha ...
After putting an order in the cart the customer has to type in his billing details, then he is supposed to register and checkout after answer the captcha. but after clicking on "register and check out" he get's redirected to the start page of website.
The recaptcha was also not working, now it seems like it is.

The shop is installed on a german website. www.trainingmitsystem.de
You can order products here
https://www.trainingmitsystem.de/fertige-trainingsplaene/triathlon/sprintdistanz/sp-36-3-5-detail

I have an active subbcriction on your site. Can You help?

New information:
Existing customer can order and I can create a new use/customer in the backend. Nobody can register via the normal joomla login form I reactivated to test.

I hope to get an answer - Takao.