@rahusigu, is there any chance you updated virtaulbox after having parrot installed in said virtual machine?
I had a simliar issue on a friend’s linux mint machine where they were testing Ubuntu in virtual box just fine until they upraded virtualbox from version 6.0.4 to 6.0.6.
I don’t remember the correct fix implemented for this, but the following was a quick fix for me when this originally occurred. I don’t recommend using the quick fix unless you need it to recover data from the virtual machine.