FYI this is a common message google chrome users some times receive.
I don't use google chrome but a warning does not necessarily mean that what it says.
In other words, if you are at a trusted site, trusted source, there is no worry about it.
If you are not at a trusted source, then it would be wise to research it before installing.
That is all that warning message is telling you.
Just like when you go to open an exe file, you get a warning, this is sort of the same
However, according to google chrome, that is a high alert message which normally
results from an item containing a NPAPI plug-in. Of which so I am told those types
of plugins do have the ability to access files...the ability but does not mean it would.
You really need to wait for a reply from admin here.