Error resolving template "instances" when running on weblogic - weblogic

Question

I'm probably missing some configuration, but I cannot find out which one.
I have working client app and running monitoring app, everyting works when both executed as a "standalone" apps, meaning, that they do not run in any application server.
But I'm trying to run them also under weblogic. Both app are deployed, registration is ok, regular updates of app status shows that monitored app is UP. However in UI no registered app are shown. When checking network in chrome development console, I can see, that:
GET http://localhost:7001/cchAdmin/applications 500 (Internal Server Error)
failed. Checking monitoring app logs, one can find
Looking up handler method for path /cchAdmin/applications
2019-01-07 16:59:18.022 DEBUG 13460 --- [ (self-tuning)'] .b.a.s.w.s.AdminControllerHandlerMapping : Did not find handler method for [/cchAdmin/applications]
2019-01-07 16:59:18.023 DEBUG 13460 --- [ (self-tuning)'] .b.a.s.w.s.AdminControllerHandlerMapping : Looking up handler method for path /cchAdmin/applications
2019-01-07 16:59:18.023 DEBUG 13460 --- [ (self-tuning)'] .b.a.s.w.s.AdminControllerHandlerMapping : Did not find handler method for [/cchAdmin/applications]
2019-01-07 16:59:19.178 DEBUG 13460 --- [ (self-tuning)'] .b.a.s.w.s.AdminControllerHandlerMapping : Looking up handler method for path /instances
2019-01-07 16:59:19.178 DEBUG 13460 --- [ (self-tuning)'] .b.a.s.w.s.AdminControllerHandlerMapping : Returning handler method [public reactor.core.publisher.Mono<org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, de.codecentric.boot.admin.server.domain.values.InstanceId>>> de.codecentric.boot.admin.server.web.InstancesController.register(de.codecentric.boot.admin.server.domain.values.Registration,org.springframework.web.util.UriComponentsBuilder)]
2019-01-07 16:59:19.179 DEBUG 13460 --- [ (self-tuning)'] .b.a.s.w.s.AdminControllerHandlerMapping : Looking up handler method for path /instances
2019-01-07 16:59:19.180 DEBUG 13460 --- [ (self-tuning)'] .b.a.s.w.s.AdminControllerHandlerMapping : Returning handler method [public reactor.core.publisher.Mono<org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, de.codecentric.boot.admin.server.domain.values.InstanceId>>> de.codecentric.boot.admin.server.web.InstancesController.register(de.codecentric.boot.admin.server.domain.values.Registration,org.springframework.web.util.UriComponentsBuilder)]
2019-01-07 16:59:19.181 DEBUG 13460 --- [ (self-tuning)'] d.c.b.a.server.web.InstancesController : Register instance Registration(name=XXX, managementUrl=http://localhost:7001/XXX/actuator, healthUrl=http://localhost:7001/XXX/actuator/health, serviceUrl=http://localhost:7001/XXX, source=http-api)
2019-01-07 16:59:19.183 ERROR 13460 --- [ (self-tuning)'] org.thymeleaf.TemplateEngine : [THYMELEAF][[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'] Exception processing template "instances": Error resolving template "instances", template might not exist or might not be accessible by any of the configured Template Resolvers
org.thymeleaf.exceptions.TemplateInputException: Error resolving template "instances", template might not exist or might not be accessible by any of the configured Template Resolvers
at org.thymeleaf.engine.TemplateManager.resolveTemplate(TemplateManager.java:870)
at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:607)
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1098)
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1072)
at org.thymeleaf.spring5.view.ThymeleafView.renderFragment(ThymeleafView.java:354)
...
from which I'd thought, that application context path got somewhat lost, and maybe the app should query cchAdmin/instances instead of /instances.
"Disappearing" context path, if that's the case, is set via <context-root>/cchAdmin</context-root> in weblogic.xml, while there insn't any configuration for spring-boot-admin. Only spring-boot-client got some configuration, but that one seems to be working.
any ideas what could be wrong here? I don't see any way to specify context-path for admin project, spring.boot.admin.context-path does something else, and spring.boot.admin.ui.public-url does not help. Spring boot admin version is: 2.0.4