Error of job's log-manager and stdout/stderr

Organization Name:

Short summary about the issue/question:
Cannot access log-manager (through the button browser log folder, error 502 Bad Gateway after about 1-5 minutes of page loading) and stdout/stderr (only showing "Loading..." forever). Found "log-manager-xxx" pods are running correctly. The logs are like x.x.x.x - [17/Aug/2020:03:20:18 +0000] "GET /healthz HTTP/1.1" 200 18 "-" "kube-probe/1.15". All other functionalities seem to work correctly (job submission / running / ...).

Brief what process you are following:

How to reproduce it: not sure (but I reinstalled (after kubeadm reset on all machines) the OpenPAI, and this problem was still there)

OpenPAI Environment:

• OpenPAI version: v1.0
• Cloud provider or hardware configuration: local cluster
• OS (e.g. from /etc/os-release): PRETTY_NAME="Ubuntu 18.04.4 LTS"
• Kernel (e.g. uname -a): 5.4.0-42-generic #46~18.04.1-Ubuntu SMP Fri Jul 10 07:21:24 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
• Hardware (e.g. core number, memory size, storage size, GPU type etc.):
• Others:

Anything else we need to know:
The firewall is off on all nodes