Starting with PhpStorm 2023.3 there are new rules for multithreading that phpunit_codecoverage does not comply with. See https://plugins.jetbrains.com/docs/intellij/general-threading-rules.html
For a workaround I found the plugin and removed it and PhpStorm was able to start up again. Leaving a note here in case others encounter an issue where PhpStorm won't start up, and this plugin is mentioned in the stack trace.
Starting with PhpStorm 2023.3 there are new rules for multithreading that phpunit_codecoverage does not comply with. See https://plugins.jetbrains.com/docs/intellij/general-threading-rules.html
For a workaround I found the plugin and removed it and PhpStorm was able to start up again. Leaving a note here in case others encounter an issue where PhpStorm won't start up, and this plugin is mentioned in the stack trace.