We recently shifted our magento sites from one server to another server. And from then when our customers try to login from front end, either get a blank page or local host page. But if they hit back button and try logging in again then it works. Why is this happening?
Normally this session, cache or memory related.
Few steps for you to try without obviously seeing your servers error logs:
1. Empty your var/sessions folder.
2. Empty your var/cache folder.
3. Make sure you have enough memory allocated to php in your php.ini
If none of those work try and get hold of your servers error_log file and share it so we can review for you and give you a better diagnosis.
Yes S Macfarlane,
The mentioned suggestion works. I have already tried same in past.