The same issue has been reported here:
https://issues.jenkins-ci.org/browse/JENKINS-59145
The solution was to skip upgrading the "Prometheus metrics" plugin.
If you have already updated the plugin, then downgrade it and restart JS.
On Thursday, October 17, 2019 at 8:22:26 PM UTC+3
I've just updated Jenkins again from from 2.176 to 2.190.1, this time I
didn't update the plugins and the issue didn't come up.
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Right, I have only updated the suggested plugins, the ones that were marked
eligible for update.
No I didn't try updating then all before reverting back.
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