Web applications run in a web browser (e.g. Firefox, Chrome, Edge, Safari, ... ), so they are not installed locally on the PC.

The browser cache is a memory of the web browser, in which already retrieved web pages are stored locally on the hard disk of the PC as a copy. This saves time, but can also occasionally cause problems.
Cookies are also information that is stored from visited web pages on the PC, so that, for example, a web application can recognise a visitor again.

So if you observe effects like incorrect display, empty browser window, endlessly loading pages etc., the following steps can help:

Tip 1: Ctrl + F5

Tip 1: Ctrl + F5

Pressing the key combination 'Ctrl' + 'F5' or 'Ctrl' + 'R' will delete the cached version and reload a web page from the server.

 

 

Tip 2: Log out, close browser, log in again

Log out of the web application (logout can usually be found in the top right menu),
and log in again.
If in doubt, also close the browser in between.

Tip 3: Use a different browser or private window, or a different device

To distinguish whether the problem is with the web application itself (server-side) or a local problem on your PC, it is recommended to use a different browser or to open the application in a new private window.

If possible, please try it on a diferent device.

If you are working from home, you can try switching the router off and on again.

If this is a BOKU service: Maintenance may be in progress. All regular maintenances of BOKU-IT are published in the maintenance calendar: https://short.boku.ac.at/it-wartungskalender   

Tip 4: Empty browser cache, delete cookies

Deleting all cookies and the browser cache can fix many problems.
Instructions for different browsers can be found below.

If you have set up this device as a "trusted device" as part of multi-factor authentication (MFA) and delete all cookies, the cookie that identifies this device as a trusted device will also be deleted. A second factor is therefore required on this device again.

Empty browser cache - Mozilla Firefox

Press the key combination 'Ctrl' + 'Shift' + 'Del'
Select the time period,
checkmark at "Cookies"
checkmark at "Cache"

or follow the steps in the screenshot:

Empty browser cache - Google Chrome

Press the key combination 'Ctrl' + 'Shift' + 'Del'

or follow the steps in the screenshot:
 

Empty browser cache - Microsoft Edge

Press the key combination 'Ctrl' + 'Shift' + 'Del'

or follow the steps in the screenshot:

Empty browser cache - Apple Safari

Press the key combination 'Cmd' + 'Alt' + 'E'

or follow the steps in the screenshot:

Empty browser cache- iPhone, iPad

Please follow the manufacturer's instructions:

Tip 5: Correct date and time

If the date and time are not set correctly or accurately enough, this can cause problems with some applications. Recommendation: Use a time server to always get the exact time automatically: