Unhelpful errors on non existing target in configuration file on IntelliJ

[t4lz]

Bug Description

When running with mirrord on PyCharm (probably also on other IntelliJ based IDEs), with a target that does not exist in the configuration, the run fails with many errors that don't say what the problem is:

and running is then disabled:

We should tell the user why running failed, and no let the error escalate all the way to an IDE error.

Steps to Reproduce

1. Open the python-e2e dir in PyCharm.
2. Click on mirrord's configuration button.
3. Add

       "target": {
           "path": "deploy/some-non-existing-name"
       }

   to the config file.
4. Enable mirrord.
5. Run.

Backtrace

No response

Relevant Logs

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Your operating system and version

macOS 13.3

Local process

python3

Local process version

No response

Additional Info

No response