"no connection to ProximaMP: check the internet and try again"

The command could not reach ProximaMP: check that this computer has internet access and run it again. The exit code is 4.

What to do

1. Check this computer's internet access: the answer must have an HTTP/ line.

   curl -I https://proximamp.com                              # Linux
   docker run --rm curlimages/curl -I https://proximamp.com   # a Docker container reports the error

   curl.exe -I https://proximamp.com

2. If the internet works and a tunnel command (tcp, udp, http, https, up) reports the error, the ProximaMP server the tunnel opens on may be down: run the command again in a few minutes. To see whether planned maintenance or an outage is under way, check the news.

3. If the curl from step 1 works but the tunnel command doesn't, run it from another network, for example your phone's hotspot. If it works there, a firewall or corporate network lets only HTTPS through: ask the network's administrator to allow this computer's outgoing connections to ProximaMP's servers. To learn which connections are needed, click "Ask a question" at the bottom of the page.

4. Run the command again. In a script, retry on exit code 4 after a pause: the error is usually temporary.

If that didn't help

Click "Ask a question" at the bottom of the page and include the exact error text, the output of proximamp version and when the error appeared.