Trying to open blue-ocean from the top-level leaves an empty job list and raises an error in javascript_

Firefox

Error fetching page TypeError: data._links is undefined
Stack-Trace:
bunkerKey@https://<host>/jenkins/adjuncts/9efea986/io/jenkins/blueocean/blueocean-core-js.js:57207:7
setItem@https://<host>/jenkins/adjuncts/9efea986/io/jenkins/blueocean/blueocean-core-js.js:57250:21
executeAction@https://<host>/jenkins/adjuncts/9efea986/io/jenkins/blueocean/blueocean-core-js.js:40729:16
[220]</</createAction/res@https://<host>/jenkins/adjuncts/9efea986/io/jenkins/blueocean/blueocean-core-js.js:40701:16
[349]</PipelineService/_this.bunkerMapper@https://<host>/jenkins/adjuncts/9efea986/io/jenkins/blueocean/blueocean-core-js.js:58214:34
setItem@https://<host>/jenkins/adjuncts/9efea986/io/jenkins/blueocean/blueocean-core-js.js:57249:46
executeAction@https://<host>/jenkins/adjuncts/9efea986/io/jenkins/blueocean/blueocean-core-js.js:40729:16
[220]</</createAction/res@https://<host>/jenkins/adjuncts/9efea986/io/jenkins/blueocean/blueocean-core-js.js:40701:16
[344]</setItems/<@https://<host>/jenkins/adjuncts/9efea986/io/jenkins/blueocean/blueocean-core-js.js:57268:16
setItems@https://<host>/jenkins/adjuncts/9efea986/io/jenkins/blueocean/blueocean-core-js.js:57267:1
[347]</fetchNextPage/<@https://<host>/jenkins/adjuncts/9efea986/io/jenkins/blueocean/blueocean-core-js.js:57867:29
executeAction@https://<host>/jenkins/adjuncts/9efea986/io/jenkins/blueocean/blueocean-core-js.js:40729:16
[220]</</createAction/res@https://<host>/jenkins/adjuncts/9efea986/io/jenkins/blueocean/blueocean-core-js.js:40701:16
blueocean-core-js.js:57883:17

Chromium:

Error fetching page TypeError: Cannot read property 'self' of undefined
at ActivityService.bunkerKey (blueocean-core-js.js:57207)
at ActivityService.setItem (blueocean-core-js.js:57250)
at executeAction (blueocean-core-js.js:40729)
at ActivityService.res (blueocean-core-js.js:40701)
at PipelineService._this.bunkerMapper (blueocean-core-js.js:58214)
at PipelineService.setItem (blueocean-core-js.js:57249)
at executeAction (blueocean-core-js.js:40729)
at PipelineService.res (blueocean-core-js.js:40701)
at blueocean-core-js.js:57268
at Array.map (<anonymous>)
at PipelineService.setItems (blueocean-core-js.js:57267)
at blueocean-core-js.js:57867
at executeAction (blueocean-core-js.js:40729)
at res (blueocean-core-js.js:40701)