I have installed that very package within Kibana 7.14.0, and worked for me. Can you verify:
- you patched kibana
- patching Kibana went well:
$ node/bin/node plugins/readonlyrestkbn/ror-tools.js verify
[ROR COMPAT] Received command: verify
[ROR COMPAT] Verifying presence of ROR hooks on Kibana files..
[ROR COMPAT] found patch file /usr/share/kibana/plugins/readonlyrestkbn/kibana/patchers/patches_for_kbn_distribution/http_server.js.patch
verifying patched state...
http_server.js patched state VERIFIED.
[ROR COMPAT] found patch file /usr/share/kibana/plugins/readonlyrestkbn/kibana/patchers/patches_for_kbn_distribution/serve.js.patch
verifying patched state...
serve.js patched state VERIFIED.
- verify the content of this directory:
$ ls plugins/readonlyrestkbn/kibana/
config configUtils.js kibanaConfigInterceptor.js kibanaHttpServerSecurityMiddleware.js patchers rorStore.js