Please ensure computer's clock is showing the correct time to avoid issues in SSL connection. If your computer is not able to hold the correct time after restart, consider changing battery of your system clock.
News on network congestion post covid-19 - Read here
To start with try accessing the site on - labsmart.app
If you are still unable to connect normally, you should try accessing the site over VPN. Use the following steps:
Once VPN is turned on you should be able to access the site normally. First page load might be slow. Screenshot shown below:
The error will only occur when you are trying to submit a form.
This error is most likely caused by your web browser or it's extension. Try changing your web browser or disable all the extensions.