Kibana error : uiRoutes.when is not a function

Hello,

We encounter this random error in kibana while loading the RoR configuration page.
Clearing the web browser cache corrects the problem, but the error reappears frequently.
Can you help us correct this problem?

ElasticSearch version : 7.8.1 (basic version)
Kibana Version : 7.8.1
ReadOnlyRest plugins : Enterprise-1.26.1-20210209_es7.8.1

uiRoutes.when is not a function

Version: 7.8.1
Build: 32141
TypeError: uiRoutes.when is not a function
    at Object.1861 (http://douera:55601/32141/bundles/readonlyrest_kbn.bundle.js:2:8018)
    at __webpack_require__ (http://douera:55601/32141/bundles/readonlyrest_kbn.bundle.js:2:1564)
    at Object.requireLegacyFiles (http://douera:55601/32141/bundles/readonlyrest_kbn.bundle.js:2:6023)
    at LegacyPlatformService.start (http://douera:55601/32141/bundles/commons.bundle.js:8:1399065)
    at CoreSystem._callee2$ (http://douera:55601/32141/bundles/commons.bundle.js:8:512472)
    at l (http://douera:55601/32141/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:288:969217)
    at Generator._invoke (http://douera:55601/32141/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:288:968970)
    at Generator.forEach.e.<computed> [as next] (http://douera:55601/32141/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:288:969574)
    at asyncGeneratorStep (http://douera:55601/32141/bundles/commons.bundle.js:8:503803)
    at _next (http://douera:55601/32141/bundles/commons.bundle.js:8:504114)

Regards,
Eric Rigaut

As far as I can remember, I didn’t see this error before. Will have a look at the code tomorrow.