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The buffer size of pipes isn't unlimited. You're creating a deadlock, where the child process is hanging because it's trying to write to a buffer that's full, and your parent process doesn't try to read anything from the buffer until the child process has completed. To fix the problem, you need to use another thread to read from the buffer while the child process is still running. The simplest way to do this is to use readProcess or a similar function in place of createProcess. If this doesn't give you enough flexibility to do what you want, then you'll need to create and manage the other thread yourself, which you can see how to do by looking at how readProcess is implemented.

This answer is no longer directly relevant, as we know the platform is Windows 10, but for future reference: When you get to Windows 11 you can have a similar problem if "Controlled Folder Access" is enabled: this can prevent applications from accessing user folders. You will need to add Dyalog APL to the list of "allowed apps", which is quite straightforward if you have admin rights on your machine.

If you start APL and get a warning about being unable to rebuild the command cache because a folder does not exist, go to the "Ransomware protection" section of Windows Security settings, select "Allow an app through controlled folder access", select "Add an app", and you should be able to select APL from a list of "recently blocked apps".

If you have not recently been blocked you will need to select dyalog.exe using a file explorer.

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It may have been a false positive, please send it for check, it happened to me too a few hours ago.

Your $PATH variable is most likely not set properly. Most likely, some other app modified your $PATH variable on your system to direct python towards a folder that doesn't contain a Python installation. Check out this article for some information on how to check your PATH and modify it. (disclosure: I randomly googled and picked this article out of the top 5 results because it looks like it gives the clearest explanation.)

Also, try using PowerShell and not cmd.exe, PowerShell behaves as expected with $PATH changes, cmd.exe sometimes doesn't work.

A potentially overkill solution: Use the Windows Application manager in Settings to uninstall any existing Python installations, get a fresh copy of the installer from the official Python website (be sure you get the installer for the right version, if you need a specific version), and run the installation again, fresh. Double check the installation prompts to be sure it adds Python to your $PATH, and then use PowerShell to run Python. That specific .dll is for Python 3.6, so start by trying to install that version first.

I think the issue is you are creating a new connection for each request, just do

Check out the wordpress child themes documentation.

There you can find this line

We can group by 'CP' and get the cumsum of 'MNOZSTVI' in mutate

It is an issue with IDE resolving the plugin's Groovy DSK. Created the bug for it: IDEA-269820.