For anyone interested in the Web Manager issue (stuck at 'Loading') after logging in, here is the fix for all browsers:
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Details
IP Office Server Edition Any version to 11.0 FP 4
Problem Clarification
After upgrade to IP Office 11.0 FP 4, can no longer access Web Manager (port 7070). Browser screen shows "Loading..." but never completes.
Web Control on port 7071 works fine
Cause
This happens only if the user has accepted the Google Analytics EULA for Web Manager earlier.
Solution
You need to delete the Browser cookies for the Name / FQDN / IP Address of the IP Office Server Edition you are trying to access
For Chrome:
Delete cookies from a site
1. On your computer, open Chrome.
2. At the top right, click More Settings.
3. At the bottom, click Advanced.
4. Under "Privacy and security," click Content settings.
5. Click Cookies See all cookies and site data.
6. At the top right, search for the website's name.
7. To the right of the site, click Remove .
For Firefox,
1. Go to Options
2. Privacy
3. Select “remove individual cookies”
4. Search for the name / IP address for the IP Office.
5. Click the Remove All Button.
How do I delete an individual cookie? (Internet Explorer 10/11)
1. Open Internet Explorer.
2. Click on the Tools button in the top right hand corner.
3. Select Internet Options.
4. Find 'Browsing History'
5. Click on Settings.
6. Click View Files.
The folder contains all stored Cookies, select the one for your IPO and delete them.