To fix your Certificate problem in Mulberry, please follow the instructions below:
Click on the links below to download/save the two Certificates to your DESKTOP
Mulberry Certificatt installation instructions:
1) After downloading, launch Mulberry, then go to File; Preferences
2) Turn the 'Advanced' radio button "on" (if not already)
3) Click on the Security tab
4) click the Manage Certificates button in the lower left corner
5) click the AUTHORITIES Tab at the top, then Click the Import button
6) select/locate UTNAddTrustServerCA.crt downloaded earlier, click 'open'
7) repeat steps 5-6 for AddTrustExternalCARoot.crt
8) click the 'Reload All Certificates' button (you will NOT see anything happen) - then click the OK button
9) MAKE SURE TO CLICK THE SAVE DEFAULT BUTTON FIRST BEFORE EXITING THE PREFERENCES
10) Exit, then restart Mulberry