panel login error

[SAM172788]

Hi!

After upgrading from v1.2.15 to v1.2.16 everything fine just can't login to admin dashboard and getting next error:

No match for Username and/or Password.You are trying to login in non-secure unsafe mode! Please switch to secure HTTPS to proceed.

I check log error on /public_html/system/logs/error.txt and found this

2020-05-17 18:02:10 - warning:  AbanteCart core v.1.2.16 mysqli::__construct(): (HY000/1045): Access denied for user 'u6047506_ac2'@'localhost' (using password: YES) in <b>/home/u9436170/public_html/core/database/amysqli.php</b> on line <b>50</b>
2020-05-17 18:02:10 - App Error:  AbanteCart core v.1.2.16 Cannot establish database connection to u6047506_ac2 using u6047506_ac2@localhost
Trace:
   #0 /home/u9436170/public_html/core/database/amysqli.php on line 52
   #1 /home/u9436170/public_html/core/lib/db.php on line 52
   #2 /home/u9436170/public_html/core/init.php on line 322
   #3 /home/u9436170/public_html/index.php on line 55

any suggestions please??

Thank You...

[abolabo]

Hi. 
Please note: upgrade process DO NOT AFFECT on any configuration files.

You error text indicates that Abantecart cannot to connect to your database. 
Please check database credentials inside system/config.php.

Also you can check permissions for that config. Please set it to "read" for web-server(php) user.