This is probably a tables-to-div migration issue. Thanks for the report!

I can't duplicate the problem as described,. Can you provide more details so that others can duplicate the problem?

As far as I can tell from the ssh-credentials plugin source code, there are no references to HTML tables in any of the UI components. I don't see how it could cause a regression in 2.277.1 job configuration. I confirmed that my freestyle and pipeline jobs that use ssh credentials can be saved with 2.277.1.

If rollback to 1.18.0 resolved the issue, then it is not a tables to divs issue. 1.18 was released 15 months ago with no changes related to tables to divs. 1.18.1 was released 2 months ago and only changed test infrastructure, not code functionality.

I think something else is the root cause of the failure to save that configuration. Could you assure that you've used the instructions in the Jenkins 2.277.1 upgrade guide and in the table to div layout migration to investigate the issue? If that does not bring you to a complete solution, then include the detailed information in this issue. That should include the precise list of plugins installed and the type of job that is failing to save.

I reassigned this from ssh-credentials to _unsorted because the issue is not related to ssh-credentials plugin. Without more data from the user, we can't deduce where the issue is, but I'm confident that the issue is not in the ssh-credentials plugin.

Firstly, sorry for the late reply. Debugging on my own is not an option as it requires me to disable plugins which is going to create problems with production. I am attaching all the plugins that is currently installed. And I did follow the installation guide. 

Hope this can be of any help! After this upgrade the "office 365 connector" plugin has also stopped working. Someone please help me out. 

jishwin12 please provide the list of plugins and their versions in a format that others can use without retyping everything from screenshots. I and other volunteers here are much less likely to help until you provide a plugins.txt file generated using the "How to report a bug" instructions.

A quick review of the screenshots shows that you have multiple plugins with known security issues and one with known issues with form modernization ("tables to divs").

Known Security Issues - Remove These

• Slackupload plugin
• GitLab Hook plugin
• Alauda Kubernetes support plugin
• Hudson SCP plugin

Known Tables to Divs Issues - Remove These

• Multiple SCMs

Here you go markewaite. 

jsch:0.1.55.2
label-linked-jobs:6.0.1
blueocean-commons:1.24.5
mercurial:2.14
echarts-api:5.0.2-1
structs:1.22
gitlab-oauth:1.10
gitlab-api:1.0.6
groovy:2.3
apache-httpcomponents-client-4-api:4.5.13-1.0
aws-codecommit-jobs:0.3.0
subversion:2.14.0
pipeline-model-extensions:1.8.4
downstream-buildview:1.9
external-monitor-job:1.7
kubernetes:1.29.2
workflow-aggregator:2.6
mailer:1.34
git:4.7.1
bootstrap4-api:4.6.0-3
jquery3-api:3.6.0-1
alauda-kubernetes-support:2.3.0
command-launcher:1.5
workflow-api:2.42
workflow-job:2.40
ssh-credentials:1.18.1
authentication-tokens:1.4
blueocean-rest-impl:1.24.5
multiple-scms:0.6
simple-theme-plugin:0.6
javadoc:1.6
workflow-cps-global-lib:2.18
blueocean-web:1.24.5
jackson2-api:2.12.2
ssh-slaves:1.31.5
gitlab-plugin:1.5.20
slack-uploader:1.7
kubernetes-client-api:4.13.2-1
docker-workflow:1.26
pipeline-stage-tags-metadata:1.8.4
pipeline-milestone-step:1.3.2
credentials:2.3.17
active-directory:2.23
ruby-runtime:0.12
github:1.33.1
lockable-resources:2.10
jquery-detached:1.2.1
bitbucket:1.1.27
Office-365-Connector:4.14.0
workflow-scm-step:2.12
matrix-auth:2.6.6
matrix-project:1.18
pipeline-stage-step:2.5
pipeline-build-step:2.13
antisamy-markup-formatter:2.1
rvm:0.6
pipeline-input-step:2.12
ant:1.11
bouncycastle-api:2.20
checks-api:1.7.0
global-slack-notifier:1.5
handlebars:3.0.8
unity3d-plugin:1.3
variant:1.4
momentjs:1.1.1
blueocean-jwt:1.24.5
plain-credentials:1.7
docker-commons:1.17
aws-java-sdk:1.11.995
git-client:3.7.1
saferestart:0.3
sonargraph-integration:5.0.1
pipeline-rest-api:2.19
downstream-ext:1.8
workflow-basic-steps:2.23
github-api:1.123
ldap:2.5
aws-secrets-manager-credentials-provider:0.5.3
blueocean-core-js:1.24.5
aws-codebuild:0.52
aws-credentials:1.28.1
thinBackup:1.10
kubernetes-credentials:0.8.0
preSCMbuildstep:0.3
font-awesome-api:5.15.2-2
credentials-binding:1.24
pipeline-model-definition:1.8.4
pipeline-stage-view:2.19
sonar:2.13
PrioritySorter:4.0.0
date-parameter:0.0.4
token-macro:2.15
ssh:2.6.1
slack:2.46
workflow-multibranch:2.23
script-security:1.76
extended-read-permission:3.2
git-server:1.9
snakeyaml-api:1.27.0
ssh-agent:1.22
mask-passwords:3.0
workflow-step-api:2.23
publish-over:0.22
okhttp-api:3.14.9
pipeline-graph-analysis:1.10
aws-codepipeline:0.44
metrics:4.0.2.7
build-timestamp:1.0.3
postbuildscript:2.11.0
pipeline-model-api:1.8.4
extensible-choice-parameter:1.7.0
plugin-util-api:2.1.0
jenkins-design-language:1.24.5
windows-slaves:1.7
confluence-publisher:2.0.6
workflow-cps:2.90
publish-over-dropbox:1.3.2
popper-api:1.16.1-2
xcode-plugin:2.0.14
workflow-durable-task-step:2.38
email-ext:2.82
trilead-api:1.0.13
role-strategy:3.1.1
branch-api:2.6.3
jdk-tool:1.5
cloudbees-folder:6.15
durable-task:1.35
aws-codecommit-trigger:3.0.5
junit:1.49
pam-auth:1.6
scm-api:2.6.4
scp:1.8
ace-editor:1.1
display-url-api:2.3.4
badge:1.8
workflow-support:3.8
gitlab-hook:1.4.2
blueocean-rest:1.24.5
gitlab-merge-request-jenkins:2.0.0
favorite:2.3.3
mapdb-api:1.0.9.0

I confirmed that the plugin list you provided fails to save the system configuration when run with Java 8. It fails completely when run with Java 11 because you are using plugins that depend on the obsolete ruby runtime plugin.

With Java 8, I was able to allow the system configuration to save by disabling the following plugins:

Disable plugins with security issues

• Alauda Kubernetes Suport Plugin
• Gitlab Hook Plugin
• Slack Upload Plugin
• Hudson SCP publisher plugin

Disable deprecated plugins and their dependencies

• Multiple SCMs plugin - known to have issues with configuration form modernization
• AWS CodeCommit Trigger Plugin - requires multiple SCMs plugin
• Gitlab Merge Request Builder

This has been resolved for now. The configure page UI is not broken anymore after I disabled the said plugins. Thank you.

Closed because jishwin12 says that it was resolved by taking the requested steps