We have some problem. I disabled this plugins:
external-monitor-job.jpi
junit-attachments.jpi
maven-metadata-plugin.jpi
Parameterized-Remote-Trigger.jpi
strawboss.jpi
m2-repo-reaper.jpi
maven-repo-cleaner.jpi
xshell.jpi
maven-deployment-linker.jpi
schedule-build.jpi
PrioritySorter.jpi
jacoco.jpi
startup-trigger-plugin.jpi
async-http-client.jpi
cvs.jpi
pipeline-maven.jpi
http_request.jpi
nested-view.jpi
extra-columns.jpi
job-restrictions.jpi
maven-dependency-update-trigger.jpi
xunit.jpi
strict-crumb-issuer.jpi
email-ext-recipients-column.jpi
locks-and-latches.jpi
extensible-choice-parameter.jpi
bitbucket-oauth.jpi
ansicolor.jpi
maven-info.jpi
repository.jpi
build-environment.jpi
blueocean-autofavorite.jpi
job-poll-action-plugin.jpi
dtkit-api.jpi
ownership.jpi
rich-text-publisher-plugin.jpi
h2-api.jpi
selected-tests-executor.jpi
dependencyanalyzer.jpi
m2release.jpi
and save button started function well.
The problem will be in one or more of these plugins.
Blessings,
Petr
Please follow 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.