diff --git a/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/apirequest/ApiRequestEnrichment.scala b/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/apirequest/ApiRequestEnrichment.scala
index 2d2341897..9ae20a644 100644
--- a/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/apirequest/ApiRequestEnrichment.scala
+++ b/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/apirequest/ApiRequestEnrichment.scala
@@ -134,7 +134,7 @@ final case class ApiRequestEnrichment[F[_]: Monad: HttpClient](
         contexts = jsons.parTraverse { json =>
                      SelfDescribingData
                        .parse(json)
-                       .leftMap(e => NonEmptyList.one(s"${json.noSpaces} is not self-describing, ${e.code}"))
+                       .leftMap(e => NonEmptyList.one(s"${json.noSpaces} is not self-describing JSON, ${e.code}"))
                    }
         outputs <- EitherT.fromEither[F](contexts)
       } yield outputs
diff --git a/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/apirequest/Errors.scala b/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/apirequest/Errors.scala
index 3ecca8e88..1492f0bd9 100644
--- a/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/apirequest/Errors.scala
+++ b/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/apirequest/Errors.scala
@@ -13,13 +13,16 @@
 package com.snowplowanalytics.snowplow.enrich.common.enrichments.registry.apirequest
 
 final case class ValueNotFoundException(message: String) extends Throwable {
+  override def getMessage: String = "API Request enrichment:" ++ toString
   override def toString = s"Value not found $message"
 }
 
 final case class JsonPathException(message: String) extends Throwable {
+  override def getMessage: String = "API Request enrichment:" ++ toString
   override def toString = s"JSONPath error $message"
 }
 
 final case class InvalidStateException(message: String) extends Throwable {
+  override def getMessage: String = "API Request enrichment:" ++ toString
   override def toString = message
 }
diff --git a/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/apirequest/Output.scala b/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/apirequest/Output.scala
index ae0408edb..253db43d4 100644
--- a/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/apirequest/Output.scala
+++ b/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/apirequest/Output.scala
@@ -35,8 +35,8 @@ final case class Output(schema: String, json: Option[JsonOutput]) {
   def parseResponse(apiResponse: String): Either[Throwable, Json] =
     json match {
       case Some(jsonOutput) => jsonOutput.parseResponse(apiResponse)
-      case output =>
-        new InvalidStateException(s"Error: Unknown output [$output]").asLeft // Cannot happen now
+      case None =>
+        new InvalidStateException(s"Error: output key is missing").asLeft // Cannot happen now
     }
 
   /**
diff --git a/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/sqlquery/Errors.scala b/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/sqlquery/Errors.scala
index a320ebf26..a9aa5760a 100644
--- a/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/sqlquery/Errors.scala
+++ b/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/sqlquery/Errors.scala
@@ -15,7 +15,7 @@ package com.snowplowanalytics.snowplow.enrich.common.enrichments.registry.sqlque
 sealed trait SqlQueryEnrichmentError extends Throwable {
   val message: String
   override def toString = message
-  override def getMessage = message
+  override def getMessage = "SQL Query enrichment: " ++ message
 }
 final case class ValueNotFoundException(message: String) extends SqlQueryEnrichmentError
 final case class JsonPathException(message: String) extends SqlQueryEnrichmentError
diff --git a/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/sqlquery/SqlQueryEnrichment.scala b/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/sqlquery/SqlQueryEnrichment.scala
index 4aa3a63f0..a625d8a82 100644
--- a/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/sqlquery/SqlQueryEnrichment.scala
+++ b/modules/common/src/main/scala/com.snowplowanalytics.snowplow.enrich/common/enrichments/registry/sqlquery/SqlQueryEnrichment.scala
@@ -99,7 +99,7 @@ object SqlQueryEnrichment extends ParseableEnrichment {
  * @param db source DB configuration
  * @param query string representation of prepared SQL statement
  * @param output configuration of output context
- * @param ttl cache TTL
+ * @param ttl cache TTL in milliseconds
  * @param cache actual mutable LRU cache
  * @param connection initialized DB connection (a mutable single-value cache)
  */