1. Reproduce the issue with signing in.
   Open the main GUI log file C:\ProgramData\Acronis\TrueImageHome\Logs\ti_console\ti_console.0.log in a text editor, e.g. Notepad, and search for “OpenSslErrorTextReason: certificate verify failed” (without quotes) and for “0x14090086” (without quotes, too).

If either “OpenSslErrorTextReason: certificate verify failed” (without quotes) or “0x14090086” (without quotes, too) is found, re-import the certificate to resolve the issue:

1. Export certificate “Go Daddy Root Certificate Authority - G2” : press Win+R -> type certmgr.msc ->  go to Trusted Root Certification Authorities -> Certificates -> select Go Daddy Root Certificate Authority - G2 in the certificate list on the right, right-click on it and select All tasks - Export -> follow the Export wizard. Note where the certificate was exported, you will need it later.
   Remove all certificates “Go Daddy Root Certificate Authority - G2” from the system (right-click on certificate and select Delete). Check other categories, like “Intermediate Root Certification Authorities” and “Third-Party Root Certification Authorities” and delete the certificate there, if found.
2. Install exported certificate “Go Daddy Root Certificate Authority - G2”: double click on .cer certificate file exported at the first step  -> click Install certificate. In Store location, choose Local machine. After that step, use default options during installation.

   
   Alternatively, download and import the certificate from https://certs.godaddy.com/repository. Find it under "GoDaddy Certificate Chain - G2" - "GoDaddy Class 2 Certification Authority Root Certificate - G2". Direct download link: https://ssl-ccp.godaddy.com/repository/gdroot-g2.crt (right-click the link, select "Save as", make sure the resulting file has .crt file name extension). Double-click the downloaded file with .crt file name extension, click "Open", then "Install Certificate" button. Click "Local Machine", "Next", "Next", "Finish".