Do you get the following message when you go to the login area of Abantecart ?
"Your server is unable to create a session necessary for AbanteCart functionality. Check logs for exact error details and contact your hosting support administrator to resolve this error."
This issue is caused by the following difference between
an AbanteCart requirement
session.use_trans_sid = Off
and
your server php.ini file
session.use_trans_sid = 0
They are both the same but Abantecart cannot recognize this fact.
The most important thing is that you check you server php.ini file that it has the right setting which is 0 (if you get this error of course ).
A thing to mention is that this error keeps showing while your settings could be correct.
Another good point to note is that you can check all your needed settings by going to the “session” part when you log in to your admin area of Abantecart in System --> Settings --> System --> PHP info
You can then adjust your server php.ini file to the settings that are mentioned on screen.