Error message "SCRIPT5: Access is denied" occurs while trying to access websites that utilize LocalStorage

One of our clients is experiencing an "SCRIPT5: Access is denied" error while accessing websites on Windows 8.1/IE11. This issue is isolated to one client, not affecting all users.

The error message indicates a failure while trying to access 

_global.localStorage

The client mentioned that adding our site to the "Trusted Sites" list resolves the issue. However, we are unable to replicate this problem in any of our development or test environments despite using the same OS and IE version as the client. We have attempted various solutions such as enabling/disabling DOMStorage, Advanced Protection Mode, and Protection Mode without success. More information can be found here:
Access Denied for localstorage in IE10

Our current hypothesis is that a setting or group policy enforced by the client's IT department may be causing this issue rather than a code-related problem since it works fine for all other clients.

My question is:

What settings, domain policies, or group policies could I check to replicate this error?

How can I resolve this issue without modifying any code? Since the client has over 1000 users, relying on IT to adjust policies is the preferred solution rather than requiring each user to add the site to their "Trusted Sites" list.

Is there anything else I should investigate?

Any assistance would be greatly appreciated.

javascriptinternet-explorerlocal-storagewindows-8.1internet-explorer-11

Answer №1

Dealing with a similar issue, I found a solution that worked for me:

let dataStore;
try {
  dataStore = localStorage; // will throw an error if not supported by the browser
} catch(error) { // catching this error and setting up a fallback
  let innerDataStore = {};
  dataStore = {
    getItem: function(key) {
      return innerDataStore[key];
    }, 
    setItem: function(key, value) {
      return innerDataStore[key] = value;
    }, 
    removeItem: function(key) {
      delete innerDataStore[key];
    }
}

Warm regards, Aleh

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