"OpenSSL SSL_read: error..." - solution is: close vagrantfile !

I was getting this error after vagrant up runs for a while (Win10):

OpenSSL SSL_read: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac, errno 0

Turned out, I forgot to close vagrantfile in the editor!

I know this is super-basic, but if someone else is just as forgetful, that tip might help.