Problem with install IP 4.5.3

Hello,

echo problem with install IP because, if i set mysql connection, install back to language settings.

I have servage.net hosting, and php version is 7.0.

In my log files i have:

ERROR - 2017-07-13 06:35:55 --> 404 Page Not Found: /index
ERROR - 2017-07-13 06:36:17 --> Could not find the language line "cannot_connect_database_server"
ERROR - 2017-07-13 06:36:17 --> Could not find the language line "cannot_connect_database_server"
ERROR - 2017-07-13 06:37:39 --> Could not find the language line "cannot_connect_database_server"
ERROR - 2017-07-13 06:37:39 --> Could not find the language line "cannot_connect_database_server" 

If the installation goes through, it automatically log out. In logs I have then:

ERROR - 2017-07-11 19:00:29 --> Could not find the language line "cannot_connect_database_server"
ERROR - 2017-07-11 19:00:29 --> Could not find the language line "cannot_connect_database_server"
ERROR - 2017-07-11 19:01:36 --> Could not find the language line "cannot_connect_database_server"
ERROR - 2017-07-11 19:01:36 --> Could not find the language line "cannot_connect_database_server"
ERROR - 2017-07-11 19:14:47 --> Could not find the language line "cannot_connect_database_server"
ERROR - 2017-07-11 19:14:47 --> Could not find the language line "cannot_connect_database_server" 

Please help me.
Yours.
Pawel

That the language line was not found is indeed a bug, however the error seems to be pretty obvious. Either your credentials are not correct or your database server does not accept the corresponding connection.

Question, i have exuals name in db_username and db_name. Maybe this is problem?

If you tell me what exuals are I could tell you if they are a problem.
But just to be sure: never ever use any special characters in your database or usernames. ASCII only.

Example DB pass

my example pass: KI5lFx8NAuToRI48H6pj8Xncw2w