diff --git a/src/Analysis/Problem/Bukkit/PluginDependencyProblem.php b/src/Analysis/Problem/Bukkit/PluginDependencyProblem.php
index 5e99f2af..aac0217c 100644
--- a/src/Analysis/Problem/Bukkit/PluginDependencyProblem.php
+++ b/src/Analysis/Problem/Bukkit/PluginDependencyProblem.php
@@ -11,9 +11,9 @@ class PluginDependencyProblem extends PluginFileProblem
     protected string $dependencyPluginName;
 
     /**
-     * @return string|null
+     * @return string
      */
-    public function getDependencyPluginName(): ?string
+    public function getDependencyPluginName(): string
     {
         return $this->dependencyPluginName;
     }
diff --git a/src/Analysis/Problem/Bukkit/UnsupportedClassVersionProblem.php b/src/Analysis/Problem/Bukkit/UnsupportedClassVersionProblem.php
index 23e8223d..bab42df9 100644
--- a/src/Analysis/Problem/Bukkit/UnsupportedClassVersionProblem.php
+++ b/src/Analysis/Problem/Bukkit/UnsupportedClassVersionProblem.php
@@ -44,7 +44,10 @@ public function setMatches(array $matches, mixed $patternKey): void
             $this->classFileVersion = intval($matches[3]);
         }
 
-        $this->addSolution(new UpdateJavaSolution($this->getJavaVersion()));
+        $javaVersion = $this->getJavaVersion();
+        if ($javaVersion !== null) {
+            $this->addSolution(new UpdateJavaSolution($javaVersion));
+        }
     }
 
 
diff --git a/src/Analysis/Problem/MinecraftProblem.php b/src/Analysis/Problem/MinecraftProblem.php
index 81b9dd15..d52b25f4 100644
--- a/src/Analysis/Problem/MinecraftProblem.php
+++ b/src/Analysis/Problem/MinecraftProblem.php
@@ -22,6 +22,6 @@ abstract class MinecraftProblem extends Problem implements PatternInsightInterfa
      */
     public function isEqual(InsightInterface $insight): bool
     {
-        return get_class($this) === get_class($insight);
+        return $insight instanceof static;
     }
 }
\ No newline at end of file
diff --git a/src/Detective/Detective.php b/src/Detective/Detective.php
index 3c778ceb..87d9d2a4 100644
--- a/src/Detective/Detective.php
+++ b/src/Detective/Detective.php
@@ -77,7 +77,7 @@ class Detective extends \Aternos\Codex\Detective\Detective
         BedrockContentLog::class,
         FabricServerLog::class,
         BungeeCordProxyLog::class,
-        WaterfallProxyLog::class,
+        WaterFallProxyLog::class,
         VelocityProxyLog::class,
         GeyserProxyLog::class,
         GlowstoneServerLog::class,