Trying to install Charge (v2.8.5) on a fresh install of Statamic (v2.11.13). Copied addon files into addons folder and ran update:addons as documentation instructs. Getting the following error:

The command "php composer.phar update erin-dalzell/charge --prefer-dist --no-dev --optimize-autoloader" failed.
Exit Code: 1(General error)

Output:
================


Error Output:
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  [ErrorException]
  proc_open(NUL): failed to open stream: No such file or directory

Need some advice on how to proceed please!