If Comodo Mobile Security add a Firewall that should know safe application like Google Play Store to authorize. Is inammissible that user download the Security Software Activate the Firewall and All Updates stop to work.
Is like download an Antivirus and for security block all app on your phone and you have to whitelist what is OK and you want work.
From the test of new Firewall feature is not working well on Android 5.5 because make phone break. For now the issue is relative to Google Play Store.