When opening the Activity or Branches view on Blueocean I get the following exception and the views remain empty:
blueocean-core-js.js:58316 Error fetching page TypeError: Cannot read property 'toLowerCase' of undefined
at TimeHarmonizerUtil.getI18nTitle (blueocean-core-js.js:54653)
at LiveStatusIndicator.render (blueocean-core-js.js:53961)
at ReactCompositeComponentWrapper._renderValidatedComponentWithoutOwnerOrContext (jenkins-design-language.js:49570)
at ReactCompositeComponentWrapper._renderValidatedComponent (jenkins-design-language.js:49593)
at ReactCompositeComponentWrapper.performInitialMount (jenkins-design-language.js:49133)
at ReactCompositeComponentWrapper.mountComponent (jenkins-design-language.js:49029)
at Object.mountComponent (jenkins-design-language.js:55369)
at ReactCompositeComponentWrapper.performInitialMount (jenkins-design-language.js:49142)
at ReactCompositeComponentWrapper.mountComponent (jenkins-design-language.js:49029)
at Object.mountComponent (jenkins-design-language.js:55369)
at ReactDOMComponent.mountChildren (jenkins-design-language.js:54331)
at ReactDOMComponent._createInitialChildren (jenkins-design-language.js:50457)
at ReactDOMComponent.mountComponent (jenkins-design-language.js:50276)
at Object.mountComponent (jenkins-design-language.js:55369)
at ReactDOMComponent.mountChildren (jenkins-design-language.js:54331)
at ReactDOMComponent._createInitialChildren (jenkins-design-language.js:50457)
at ReactDOMComponent.mountComponent (jenkins-design-language.js:50276)
at Object.mountComponent (jenkins-design-language.js:55369)
at ReactCompositeComponentWrapper.performInitialMount (jenkins-design-language.js:49142)
at ReactCompositeComponentWrapper.mountComponent (jenkins-design-language.js:49029)
at Object.mountComponent (jenkins-design-language.js:55369)
at ReactCompositeComponentWrapper.performInitialMount (jenkins-design-language.js:49142)
It seems to be due to faulty runs where it gets result == undefined. But on the one hand Blueocean should not choke on this and on the other hand even debugging the code to find the faulty runs turned to be very difficult.