"Access Denied" error when a user tries to view the Access Requests list in SharePoint 2010 ,2013

Granting access to user to approve a access request.
This permissions get configured when you create a site. If you edit afterwords your users might not be able to grant this access.


http://rambabuinsharepoint.blogspot.co.za/2014/10/access-denied-error-when-user-tries-to.html

This is a straight copy and paste from Rambabu's site.

To resolve this issue, change the Access Request list permissions. To do this, follow these steps:

1. As a user who has the Manage Permissions Permission Level on the affected site and who also has access to the Access Requests list (for example, a Site Collection administrator), browse to the Access Requests list in Internet Explorer.
2. Press F12 to open the F12 developer tools in Internet Explorer.
3. Click the Network tab in the Developer Tools window, and then press F5 to enable network traffic capturing.
4. Refresh the Access Requests page in Internet Explorer. After the page has loaded, press Shift+F5 to stop capturing network traffic.
5. In the Developer Tools window, double-click the first result in the URL list. This URL will end with "pendingreq.aspx."
6. In the Developer Tools window, click Request body.
7. In the search box, type pagelistid: and then press Enter.
8. The search will highlight the pageListId text. Following this text, copy the GUID after pageListId:. The GUID will be inside an opening { brace character and a closing } brace character as follows: {GUID} 
   
   Include the opening and closing brace character when you copy the GUID. This GUID is the identifier for the SharePoint Online Access Requests list for your organization.
9. In the browser address bar, enter https://<URL of affected site or site collection>/_layouts/15/ListEdit.aspx?List=<{GUID}>, and then press Enter.
   
   Note The <URL of affected site or site collection> placeholder represents the URL for the site collection where you are trying to change the access requests—for example, https://contoso.sharepoint.com. And <{GUID}> represents the GUID that you copied in step 8.
10. On the Settings page, click Permissions for this list.
11. Make the necessary changes to the permissions for the list to enable users other than those who are members of the Site Owners group to make changes to the Access Requests list.

IE Crashes when opening sites containing the calendar web part

Had this issue where i access sites and immediately my IE Crashes.

Application Log:
Faulting application name: IEXPLORE.EXE, version: 11.0.9600.18315, time stamp: 0x571ae616
Faulting module name: ucrtbase.DLL, version: 10.0.10586.9, time stamp: 0x5642c5f8
Exception code: 0x40000015
Fault offset: 0x0008469a
Faulting process id: 0x1a80
Faulting application start time: 0x01d1d369b4b31b47
Faulting application path: C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
Faulting module path: C:\WINDOWS\system32\ucrtbase.DLL
Report Id: fb7462f7-3f5c-11e6-90c9-00a0c6000017

Turns out to be a IE Addin.
Go to your "Manage Add On" in Internet explorer.
Find the "SharePoint Export Database Launcher" Add on and disable it.