I have a JMeter script that runs well on my computer but not in Azure load test

Question

In one of the earlier HTTP samplers I use a Regular expression to extract a variable.

I then pass that variable in the next GET request as a query string parameter.

https://www.mysite.com/test.aspx?ID=${myExtractedVariable}

In my local JMeter runs, I can see the extracted variable value using a Debug sampler and then the next request works well with the extracted variable passed in as a URL query string parameter.

This chokes when exported to Azure load test. My whole tests revolve around lots of regular expression extractors and using these variables in subsequent GET and POST requests.

Azure load test chokes with a Non HTTP response code: java.net.URISyntaxException error.

This is a product not ready for prime time despite how Microsoft boasts about it. There is a dearth of samples. It is laughable really. No good documentation on all the things that work well in JMeter but chokes when run in Azure load test.

I don't have months to figure this all out. Good documentation and samples would help.