Dear Sir/Madam,
Until yesterday the website aveth.ethz.ch was working perfectly.
This morning a security warning popped up whenever accessing the site (see attached).
The security warning could be bypassed using Advanced Accept the Risk and Continue.
While trying to deal with this issue, I updated all existing plugins then since the issue was not resolved I installed a new plugin called Wordfence.
I followed this plugin’s instructions but instead of resolving the issue the entire website is down and I see instead the attached internal server error.
Any advice or help you may be able to provide would be greatly appreciated.