HAP+ logon form seems to be getting blocked.
I have a small number of staff who tell me they can't log into HAP from home. In some instances it seems to be machine specific.
The best description I have been given sounds like either the form is not submitting correctly or the response is blocked as clicking log in causes the page to be refreshed with no username, but the invalid credentials text does not appear.
The same user can log into the system via a school provided laptop at home, and all works, so connection, username and password etc are all known to be working. Avast is the AV program in use, with IE as the browser.