Running incognito should negate the need to flush the browser cache I would've thought?
In any case, I tried with Firefox (which is a browser I've never used to access the dashboard) in addition to another computer entirely that I've never accessed the dashboard with either
All exhibit the same problem unfortunately
From /var/log/lighttpd/error.log:
2018-03-27 12:41:30: (mod_fastcgi.c.2543) FastCGI-stderr: PHP Fatal error: Uncaught ArgumentCountError: Too few arguments to function resolveHostname(), 1 passed in /var/www/html/admin/api_FTL.php on line 308 and exactly 2 expected in /var/www/html/admin/scripts/pi-hole/php/FTL.php:143
2018-03-27 12:41:30: (mod_fastcgi.c.2543) FastCGI-stderr: Stack trace:
2018-03-27 12:41:30: (mod_fastcgi.c.2543) FastCGI-stderr: #0 /var/www/html/admin/api_FTL.php(308): resolveHostname('192.168.1.149')
2018-03-27 12:41:30: (mod_fastcgi.c.2543) FastCGI-stderr: #1 /var/www/html/admin/api.php(86): require('/var/www/html/a...')
2018-03-27 12:41:30: (mod_fastcgi.c.2543) FastCGI-stderr: #2 {main}
2018-03-27 12:41:30: (mod_fastcgi.c.2543) FastCGI-stderr: thrown in /var/www/html/admin/scripts/pi-hole/php/FTL.php on line 143