Fix

Author: ondrejmirtes

.github/workflows/build-issue-bot.yml

@@ -14,6 +14,9 @@ on:
       - 'issue-bot/**'
       - '.github/workflows/build-issue-bot.yml'
 
+env:
+  COMPOSER_ROOT_VERSION: "1.9.x-dev"
+
 concurrency:
   group: issue-bot-${{ github.head_ref || github.run_id }} # will be canceled on subsequent pushes in pull requests but not branches
   cancel-in-progress: true

.github/workflows/issue-bot.yml

@@ -16,6 +16,9 @@ on:
       - 'apigen/**'
       - 'changelog-generator/**'
 
+env:
+  COMPOSER_ROOT_VERSION: "1.9.x-dev"
+
 concurrency:
   group: tests-${{ github.head_ref || github.run_id }} # will be canceled on subsequent pushes in pull requests but not branches
   cancel-in-progress: true

issue-bot/src/Console/DownloadCommand.php

@@ -91,7 +91,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 
 		$matrix = [
 			'phpVersion' => [70200, 70300, 70400, 80000, 80100, 80200],
-			'playgroundExamples' => array_chunk($hashes, $chunkSize),
+			'playgroundExamples' => implode(',', array_chunk($hashes, $chunkSize)),
 		];
 
 		$output->writeln(Json::encode($matrix));