You can run an SSL server test for a website to check if the SSL certificate is installed correctly.
Visit the SSL Labs page and paste the URL of the website you want to check before clicking the Submit button.
Wait a few minutes for the scan to complete and you will see whether the SSL certificate is trusted or not. An A+ rating is ideal, but unless you get a negative rating, the website should open in your browser.
Solution 2: Clear your browser cache and cookies
If your browser cache is corrupted or outdated, you may see the ERR_CERT_AUTHORITY_INVALID error. To fix this, you can try clearing your browser cache and cookies as follows.
Open Chrome and click on the three dots in the upper right corner.
When the drop-down menu appears, click austria telegram data Settings.
On the Chrome Settings page, click Privacy & Security on the left.
Now click on “Clear browsing data”.
In the pop-up window that appears, click on all three checkboxes to select them. Then click on the "Delete Data" button.
Now try reloading the page and check if the error persists.
Note: The process for clearing cache and browsing data is similar for most other browsers, although the exact steps may vary. In Firefox and Safari, you need to open the Settings section from the menu, while in Edge, the process is almost the same as in Chrome.