This morning, I updated from Jenkins 2.46.2 to 2.46.3 and then installed the "Blue Ocean" plugin.

When I access our Jenkins server using Chrome (I've not tried other browsers) and click the "Blue Ocean" button, the page appears to be loading, loading, loading [for as long as I care to wait] but never displays.

Access the console and I see this error:

blueocean.js:110391 Error initializing Jenkins JavaScript bundle "blueocean" Error: Unexpected error executing startup module
"../../src/main/js/init": Error: Must call ExtensionStore.init({
extensionData: array, typeInfoProvider: (type, cb) => ... }) first
at APromise.<anonymous> (blueocean.js:110304)
at Object.exports.make (blueocean.js:18365)
at __$$$__exec (blueocean.js:110299)
at __$$$__doBundleInit (blueocean.js:110386)
at Object.743.../../src/main/js/init (blueocean.js:110401)
at s (blueocean.js:1)
at e (blueocean.js:1) at blueocean.js:1
__$$$__doBundleInit @ blueocean.js:110391

I do not find anything in the log on our Jenkins server to give any further details regarding the issue.