Failed to open /etc/webmin/virtual-server/licence-status for writing : Bad file number

I opened up virtualmin on my server today and had this error message:

Failed to open /etc/webmin/virtual-server/licence-status for writing : Bad file number

It seems like a license issue of some kind?

I'm running 3.54 on Solaris 10 (a joyent accelerator)

Status: 
Closed (fixed)