The Issue 

On some of the MS Edge browser (after an update from MS) will block Local Network access for alll website. 

The Fix

Change it to Allow.  Then restart MS Edger browser. 

The Tech Notes

In the Developer Tool ->  Network view  an error message similar to this will show. 

Access to XMLHttpRequest at 'http://127.0.0.1:22144/?a=t&t=17654126966921765412696692' from origin 'https://www.opticare.com.au' has been blocked by CORS policy: Permission was denied for this request to access the `unknown` address space.

For Chrome

please choose Allow when the message pops up.