This can happen when the Apple operating system updates. If you have automatic updates enabled, they may install without your knowledge, which can cause a website to stop working.
If you are using Chrome, try restarting your computer to clear the issue.
If that doesn't do the trick, try the following:
- Go to Applications > Utilities > Keychain Access.
- Select (a) Keychain: Login and (b) Category: Certificates
- Scroll to the certificate for StickyFolios and delete it
- Restart Chrome
If the above steps do not work, please contact email@example.com for addtional assistance.