Login grayed out, logins rejected We have web site with CraftCMS Pro 2.6.2930. Due to development of new site, we set test web server (Centos/Apache/mariaDB) in our local network and migrated whole site there for testing (2.6.2993 with trial license). Site is working, but logins to craft admin webpage are rejected (log in button is greyed out).

For migration i have followed this Migration of Craft CMS from one host to another (we deleted license.key file)

Craft/storage/runtime/logs shows

2018/05/17 13:45:58 [warning] [application]  tried to log in unsuccessfully.

Site content is migrated successfully. 

PS: I've already tried this and it isn't working: Reset password with MySQL

Any ideas? 

PS: It seems my problem is very similar to this one Control Panel access. Greyed out button since i see (almost the same) errors
Resolved! So, the console clearly showed which files were broken. 

I've downloaded those files again from production server, and uploaded on my test server. Login succeed without any problems now!

I guess it has something to do with transfer mode (auto, binary, text etc) when transferring files via FTP. Transfer mode should be on auto, otherwise files might get corrupted which can cause all kind of (weird) problems. Thanks to Brad for help!