Update Weblogic Server
Update the Weblogic server with required patches.
Before proceeding with the domain creation, download and install the one-off Patch 32077936 or the latest WLS PSU for 14.1.1 from My Oracle Support (Doc ID 2806740.2).
After applying this patch, set the java option flag
-Dweblogic.http.disablehttp2=true
before starting servers.