Adds empty style tag

[krasinski]

The script finds vh/vw units but only adds empty <style></style> to the header. I tried to remove other js libraries that i use in my project but it didn't help.
Errors in console:

Parse error at token 334: DELIM(*).
undefined parser.js:56
Uncaught TypeError: Cannot read property 'append' of undefined parser.js:62
pop parser.js:62
parse parser.js:129
(anonymous function) vminpoly.js:272
xmlhttp.onreadystatechange vminpoly.js:45
Parse error at token 296: DELIM(*).
undefined parser.js:56
Parse error at token 456: DELIM(*).
undefined parser.js:56
Uncaught TypeError: Cannot read property 'append' of undefined parser.js:62
pop parser.js:62
parse parser.js:129
(anonymous function) vminpoly.js:272
xmlhttp.onreadystatechange

[jaheer3-zz]

I have been trying to use this I am also facing similar sort of errors
I have encountered the following errors in my console.
Unable to get property 'append' of undefined or null reference parser.js:62
Object doesn't support this property or method vminpoly.js:272