MISP Diagnositics page has been nagging about this for a while:
"Please note that the support for Python versions below 3.6 and below PHP 7.2 has been dropped as of 2020-01-01 and are henceforth considered unsupported. More info: PHP, Python."
Both PHP + Python versions are still officially supported by their projects, but PHP 7.2 will be EOL before this years end.