diff --git a/src/main/java/edu/kit/typicalc/view/content/typeinferencecontent/latexcreator/ExplanationCreatorUnification.java b/src/main/java/edu/kit/typicalc/view/content/typeinferencecontent/latexcreator/ExplanationCreatorUnification.java
index 4c36d85..7875ffa 100644
--- a/src/main/java/edu/kit/typicalc/view/content/typeinferencecontent/latexcreator/ExplanationCreatorUnification.java
+++ b/src/main/java/edu/kit/typicalc/view/content/typeinferencecontent/latexcreator/ExplanationCreatorUnification.java
@@ -85,6 +85,8 @@ public class ExplanationCreatorUnification {
            if (isLetUnification) {
                createLetUnficiationFinish();
            }
+       } else if (isLetUnification) {
+           unificationTexts.remove(unificationTexts.size() - 1);
        }
    }
 
@@ -165,8 +167,13 @@ public class ExplanationCreatorUnification {
    }
 
    private void createUnficationTexts() {
-       List<UnificationStep> unificationSteps = typeInferer.getUnificationSteps()
-               .orElseThrow(IllegalStateException::new);
+       List<UnificationStep> unificationSteps;
+       if (typeInferer.getUnificationSteps().isPresent()) {
+           unificationSteps = typeInferer.getUnificationSteps().get();
+       } else {
+           errorOccurred = true;
+           return;
+       }
 
        // skip first step since the substitutions list is still empty (unification introduction is shown)
        for (int stepNum = 1; stepNum < unificationSteps.size(); stepNum++) {
@@ -231,8 +238,10 @@ public class ExplanationCreatorUnification {
    private void createErrorText(UnificationError errorType) {
        if (errorType == UnificationError.INFINITE_TYPE) {
            unificationTexts.add(getDefaultTextLatex(KEY_PREFIX + "infiniteType"));
+           unificationTexts.add(getDefaultTextLatex(KEY_PREFIX + "infiniteType"));
        } else if (errorType == UnificationError.DIFFERENT_TYPES) {
            unificationTexts.add(getDefaultTextLatex(KEY_PREFIX + "differentTypes"));
+           unificationTexts.add(getDefaultTextLatex(KEY_PREFIX + "differentTypes"));
        }
    }