These errors could be related to a plugin or extension that is interfering with access to our authentication method. You can try accessing the library's databases using Incognito or Private browsing mode in your browser and if it works, then the problem is most likely a plugin or extension. Below are instructions to disable/delete plugins/extensions in three browsers:
Google Chrome:
Click the menu icon "≡" at the top right of the browser window, choose "Tools" and choose "Extensions" to open a new "Options" tab.
Uncheck "Enabled" to disable an extension, or click "Remove" to delete it completely.
Enter "chrome://plugins/" in Chrome'
Click the "Disable" link under the plugin you want to disable.
Mozilla Firefox:
Click the orange "Firefox" button in the top left-hand corner of the browser window and choose "Add-ons" from the right column of the menu to open an Add-ons Manager tab in the active browser window.
If you are using Windows XP, click on "Tools" from the menu bar near the top of the browser window and choose "Add-ons."
Click "Extensions" to view the installed extensions that add features to Firefox, or click "Plugins" to view plugins that add compatibility and functionality.
Find the add-on you want to disable and click its "Disable" button.
If you want to delete an extension entirely, click "Remove."
Restart Firefox to complete the process.
Safari:
Choose Safari > Preferences.
Click the Security pane.
Click Manage Website Settings to see plug-in details for a particular website.
Internet plug-ins installed on your computer appear on the left side of the plug-ins sheet. Select a plug-in to configure its website settings.
Websites that are currently open in Safari appear on the right side of the plug-ins sheet. Websites that you have already configured by clicking "Trust" or "Cancel" also appear here.
You can select Ask, Block, Allow, Allow Always and Runs in Unsafe Mode under "When visiting other websites:". Select Block to disable plugin and Allow or AllowAlways to enable.