Server error in wp after setting up Gcp loadbalancer

[Ral]

Well I installed an theme on the wordpress and the loadbalancer suddenly shows server error  

I disabled it it was fine .

Before installing theme it was fine.

Do I need to configure apache for Gcp loadbalancer .if yes plz let me know how!!!

[glen_yu]

Hi Ral!

What kind of error are you getting after you add in the the load balancer?  are you getting a 4xx error or 5xx error?

Please make sure you have the appropriate firewall rules to allow load balancer to perform health checks otherwise traffic won't be redirected if your LBs think your backend isn't available  <-- this is probably the most common cause for LB woes