Class 'Kint\Kint' not found

Hi, I just installed new CI4 fw on my Windows PC and it works fine. But when I uploaded it on production server, I see the 'Whooops page' even though i have development set up in my .env vars. I looked to error log and I get this error:

CRITICAL - 2020-04-30 14:47:29 --> Class 'Kint\Kint' not found
#0 /home/users/urbik3qzw/urbik3.4fan.cz/web/system/CodeIgniter.php(224): require_once()
#1 /home/users/urbik3qzw/urbik3.4fan.cz/web/system/CodeIgniter.php(193): CodeIgniter\CodeIgniter->initializeKint()
#2 /home/users/urbik3qzw/urbik3.4fan.cz/web/system/bootstrap.php(168): CodeIgniter\CodeIgniter->initialize()
#3 /home/users/urbik3qzw/urbik3.4fan.cz/web/public/index.php(36): require('/home/users/urb...')
#4 {main}


Anyone knows whats up with that? 

Thanks in advance