Hello ,

Can you give more details :
-What is the issue ?
-Do you have any error in log file ?
-Do you have any error in browser console ?

2017-03-27 11:04:50.681 ===== TRACE ===== Login error for user ''
2017-03-27 11:11:08.896 ===== TRACE ===== Login error for user '}'
2017-03-27 11:12:54.667 ** ERROR ** Exception-[42S02] SQLSTATE[42S02]: Base table or view not found: 1146 Table 'projeqtor.parameter' doesn't exist
2017-03-27 11:12:54.667 ** ERROR ** For query : select * from parameter where (idUser is null and idProject is null)
2017-03-27 11:12:54.667 ** ERROR ** Strack trace :
2017-03-27 11:12:54.667 ** ERROR ** #0 Sql->query called at [/var/www/html/projeqtor/model/persistence/SqlElement.php:1840]
2017-03-27 11:12:54.667 ** ERROR ** #1 SqlElement->getSqlElementsFromCriteria called at [/var/www/html/projeqtor/model/Parameter.php:792]
2017-03-27 11:12:54.667 ** ERROR ** #2 Parameter->getGlobalParameter called at [/var/www/html/projeqtor/model/UserMain.php:134]
2017-03-27 11:12:54.667 ** ERROR ** #3 UserMain->__construct called at [/var/www/html/projeqtor/model/User.php:38]
2017-03-27 11:12:54.667 ** ERROR ** #4 User->__construct called at [/var/www/html/projeqtor/tool/projeqtor.php:2680]
2017-03-27 11:12:54.667 ** ERROR ** #5 getSessionUser called at [/var/www/html/projeqtor/tool/projeqtor.php:153]
2017-03-27 11:12:54.667 ** ERROR ** #6 require_once called at [/var/www/html/projeqtor/tool/getHash.php:30]
2017-03-27 11:12:54.668 ** ERROR ** Exception-[42S02] SQLSTATE[42S02]: Base table or view not found: 1146 Table 'projeqtor.resource' doesn't exist
2017-03-27 11:12:54.668 ** ERROR ** For query : select * from resource where resource.name is null and resource.isUser = '1'
2017-03-27 11:12:54.668 ** ERROR ** Strack trace :
2017-03-27 11:12:54.668 ** ERROR ** #0 Sql->query called at [/var/www/html/projeqtor/model/persistence/SqlElement.php:1840]
2017-03-27 11:12:54.668 ** ERROR ** #1 SqlElement->getSqlElementsFromCriteria called at [/var/www/html/projeqtor/model/persistence/SqlElement.php:2022]

It seems you did not provide a user name.
Can you show print screen of login form ?

clean borwser cache and all cookies and try again.

I tried but the same problem

Chech that all required modules are correcly installed.
For instance, you may lack of SSL module.

Logs clearly show that ProjeQtOr was not correctly installed, there are missing tables (parameter, resource) in the database.
I suggest you delete your ProjeQtOr database and restart a fresh install from V6.1.3 and tell us if you have the same issue.

thank you, problem solved