Kibana error after upgrade to 8.13.2

Hello Team,

i recently upgraded by kibana instance to 8.13.2 using zip bundle after upgrades i am seeking a pop-up error alerts in UI just after logging in kibana dashboard.
is anyone can help to let me know this cause. thanks in advance.

Error: Markdown content is required in [readOnly] mode
    at u (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/plugin/banners/1.0.0/banners.plugin.js:2:6504)
    at la (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:425:59279)
    at ec (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:425:115190)
    at Pc (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:425:99978)
    at Nc (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:425:99800)
    at Dc (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:425:99633)
    at wc (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:425:96466)
    at https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:425:45201
    at t.unstable_runWithPriority (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:433:3768)
    at Vo (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:425:44978)


The above error occurred in u:
    at u (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/plugin/banners/1.0.0/banners.plugin.js:2:5941)
    at div
    at div
    at l (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/plugin/banners/1.0.0/banners.plugin.js:2:7073)
    at k (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-src/kbn-ui-shared-deps-src.js:67:188623)
    at x (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-src/kbn-ui-shared-deps-src.js:67:189424)
    at p (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-src/kbn-ui-shared-deps-src.js:67:184352)
    at Me (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-src/kbn-ui-shared-deps-src.js:67:22771)
    at t (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-src/kbn-ui-shared-deps-src.js:67:14247)
    at Re (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-src/kbn-ui-shared-deps-src.js:67:23214)
    at Context (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/plugin/kibanaReact/1.0.0/kibanaReact.plugin.js:1:24963)
    at p (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:361:597618)
    at d (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:361:188502)
    at v (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:356:3441)
    at a (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:377:1598813)
    at w (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:361:416624)
    at s (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:372:189877)
    at a (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:384:354875)
    at m (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/kbn-ui-shared-deps-npm/kbn-ui-shared-deps-npm.dll.js:377:1071028)
    at N (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/plugin/kibanaReact/1.0.0/kibanaReact.plugin.js:1:24336)
    at j (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/plugin/kibanaReact/1.0.0/kibanaReact.plugin.js:1:24572)
    at O (https://tsmage-kibana.sp.uat.abcd.corp:5601/d4d06bdf0d1d/bundles/plugin/kibanaReact/1.0.0/kibanaReact.plugin.js:1:24671)

I am adding console errors which i found in the inspect sections as below -

does anyone have any idea why its showing me default errors in the kibana /spaces/space_selector api endpoints.

whenever i am getting logged in default pages. its showing me like this always. please assist.

In your space, go to "Stack Management" menu, then "Advanced Settings" in the "Kibana" section.
In the settings page, search for "banner:placement" and set it to disabled.
Save and refresh page, it should be OK.

Seems there is a bug now if banner is enabled but Markdown content is empty.

yes thats able to fix me this banner errors. thanks for the support.