@armenuikafka I tried to reproduce this issue, although, I'm getting this error:
![Screen Shot 2022-08-31 at 12 15 57](https://user-images.githubusercontent.com/110129035/187750536-a96905db-6fef-4ea8-b71c-160f01884fce.png)

Could you confirm if you still get the ugly error using the latest codebase? I wonder if I'm doing something wrong or if it's already fixed. @daching-provectus hey, the error still actual on master. 

Steps to reproduse:
- Use the avro schema type
- edit the schema
- delete any property ("name")
- submit



https://user-images.githubusercontent.com/104780608/187843020-c9469cd4-0044-4fbd-96b3-362dd13a58e0.mov



Handle error message for schemas
**Describe the bug**
Not user friendly error message appears with submitting wrong data in Schema

**Set up**
https://www.kafka-ui.provectus.io/


**Steps to Reproduce**
Steps to reproduce the behavior:

1. Navigate to Schema Registry 
2. Open the schema
3. Edit the schema
4. Let any field empty or input wrong data
5. Press submit

**Expected behavior**
Error message about wrong data should be user friendly to indicate which data is wrong 

**Screenshots**
<img width="1718" alt="error message schema" src="https://user-images.githubusercontent.com/104780608/173566018-8e125a64-c4dc-48e3-ab3c-950f3ef45b51.png">





kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/SchemaRegistryService.java
kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/SchemaRegistryService.java
diff --git a/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/SchemaRegistryService.java b/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/SchemaRegistryService.java
index 92603ba979e..2a3039b3fe4 100644
--- a/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/SchemaRegistryService.java
+++ b/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/SchemaRegistryService.java
@@ -66,6 +66,7 @@ public class SchemaRegistryService {
 
   private static final String UNRECOGNIZED_FIELD_SCHEMA_TYPE = "Unrecognized field: schemaType";
   private static final String INCOMPATIBLE_WITH_AN_EARLIER_SCHEMA = "incompatible with an earlier schema";
+  private static final String INVALID_SCHEMA = "Invalid Schema";
 
   private final WebClient webClient;
 
@@ -237,7 +238,8 @@ private Mono<Throwable> getMonoError(ErrorResponse x) {
     } else if (isIncompatibleSchemaMessage(x.getMessage())) {
       return Mono.error(new SchemaCompatibilityException(x.getMessage()));
     } else {
-      return Mono.error(new UnprocessableEntityException(x.getMessage()));
+      log.error(x.getMessage());
+      return Mono.error(new UnprocessableEntityException(INVALID_SCHEMA));
     }
   }
 
