I don't know if this might help you, but these are some of the things I did to get it resolved:
- Refreshed All Cache Types
- Disabled All Cache Types
- Reindexed All Magento Data
- Enabled All Cache Types
- Flushed Magento Cache and Storage
- Flushed All LiteMage Cache
- Resetted all Stores "Warm-Up" under the LiteMage Crawler Warm-up Status
- Under LiteMage settings, I chose "distinguish between logged-in vs. logged out users" for the setting "Separated Cache Copy per Customer Group"
- Manually deleted all cache files and sessions (in the file manager of my cPanel)
- I set the Cookie Path to "/" and Cookie Domain to ".domain.com"
- Updated Cookie Lifetime to 86400
Hope this helps! I was having the same issue as you and customers were unable to login to their accounts.
