[horde] Suddenly Error 500 for an hour

[Daniel Stonek]

Hello,

We couldn't access login page for more than an hour because of error 500

[Sun Nov 03 09:00:29.127717 2019] [fcgid:warn] [pid 2017] [client 
186.54.98.224:51390] mod_fcgid: read data timeout in 31 seconds, 
referer: 
https://mail.domain.com/login.php?url=%2F&horde_logout_token=wvW7lH-pKpFesxjzFKGASpl&logout_reason=6&token=wvW7lH-pKpFesxjzFKGASpl

[Sun Nov 03 09:00:29.128507 2019] [core:error] [pid 2017] [client 
186.54.98.224:51390] End of script output before headers: login.php, 
referer: 
https://mail.domain.com/login.php?url=%2F&horde_logout_token=wvW7lH-pKpFesxjzFKGASpl&logout_reason=6&token=wvW7lH-pKpFesxjzFKGASpl

I didn't make any changes to Horde virtual host

I rebooted the server and still got error 500 trying to login.
After 15 minutes we could access adn login successfully.

Other virtual hosts worked correctly (VPS at Contabo)

What could be happened?

Thank you

Daniel