Thanks.
This is an error reported also by others just now and it is fixed.
Please try to use the newly build 1.4.49 or 1.5.2 to replace your current running binaries.
you can use
/usr/local/lsws/admin/misc/testbeate.sh -d 1.4.49
to get the latest 1.4.49.
Any question, please just let us know.