diff --git a/src/Umbraco.Cms.Api.Management/Extensions/HtmlHelperBackOfficeExtensions.cs b/src/Umbraco.Cms.Api.Management/Extensions/HtmlHelperBackOfficeExtensions.cs
index f501b7f312..963b176018 100644
--- a/src/Umbraco.Cms.Api.Management/Extensions/HtmlHelperBackOfficeExtensions.cs
+++ b/src/Umbraco.Cms.Api.Management/Extensions/HtmlHelperBackOfficeExtensions.cs
@@ -1,4 +1,4 @@
-using System.Text;
+using System.Text;
 using Microsoft.AspNetCore.Html;
 using Microsoft.AspNetCore.Mvc.Rendering;
 using Umbraco.Cms.Core;
@@ -24,29 +24,18 @@ public static class HtmlHelperBackOfficeExtensions
         IBackOfficePathGenerator backOfficePathGenerator,
         IPackageManifestService packageManifestService)
     {
-        try
-        {
-            PackageManifestImportmap packageImports = await packageManifestService.GetPackageManifestImportmapAsync();
+        PackageManifestImportmap packageImports = await packageManifestService.GetPackageManifestImportmapAsync();
 
-            var sb = new StringBuilder();
-            sb.AppendLine("""<script type="importmap">""");
-            sb.AppendLine(jsonSerializer.Serialize(packageImports));
-            sb.AppendLine("</script>");
+        var sb = new StringBuilder();
+        sb.AppendLine("""<script type="importmap">""");
+        sb.AppendLine(jsonSerializer.Serialize(packageImports));
+        sb.AppendLine("</script>");
 
-            // Inject the BackOffice cache buster into the import string to handle BackOffice assets
-            var importmapScript = sb.ToString()
-                .Replace(backOfficePathGenerator.BackOfficeVirtualDirectory, backOfficePathGenerator.BackOfficeAssetsPath)
-                .Replace(Constants.Web.CacheBusterToken, backOfficePathGenerator.BackOfficeCacheBustHash);
+        // Inject the BackOffice cache buster into the import string to handle BackOffice assets
+        var importmapScript = sb.ToString()
+            .Replace(backOfficePathGenerator.BackOfficeVirtualDirectory, backOfficePathGenerator.BackOfficeAssetsPath)
+            .Replace(Constants.Web.CacheBusterToken, backOfficePathGenerator.BackOfficeCacheBustHash);
 
-            return html.Raw(importmapScript);
-        }
-        catch (NotSupportedException ex)
-        {
-            throw new NotSupportedException("Failed to serialize the BackOffice import map", ex);
-        }
-        catch (Exception ex)
-        {
-            throw new Exception("Failed to generate the BackOffice import map", ex);
-        }
+        return html.Raw(importmapScript);
     }
 }
diff --git a/src/Umbraco.Infrastructure/Manifest/PackageManifestReader.cs b/src/Umbraco.Infrastructure/Manifest/PackageManifestReader.cs
index 7d4a502a35..c188694bfb 100644
--- a/src/Umbraco.Infrastructure/Manifest/PackageManifestReader.cs
+++ b/src/Umbraco.Infrastructure/Manifest/PackageManifestReader.cs
@@ -1,4 +1,5 @@
-using System.Text;
+using System.Text;
+using System.Text.Json;
 using Microsoft.Extensions.FileProviders;
 using Microsoft.Extensions.Logging;
 using Umbraco.Cms.Core.IO;
@@ -92,10 +93,15 @@ internal class PackageManifestReader : IPackageManifestReader
                     packageManifests.Add(packageManifest);
                 }
             }
+            catch (JsonException ex)
+            {
+                throw new InvalidOperationException(
+                    $"The package manifest file {fileInfo.PhysicalPath} could not be parsed as it does not contain valid JSON. Please see the inner exception for details.", ex);
+            }
             catch (Exception ex)
             {
-                _logger.LogError(ex, "Unable to load package manifest file: {FileName}", fileInfo.Name);
-                throw;
+                throw new InvalidOperationException(
+                    $"The package manifest file {fileInfo.PhysicalPath} could not be parsed due to an unexpected error. Please see the inner exception for details.", ex);
             }
         }
 
diff --git a/tests/Umbraco.Tests.UnitTests/Umbraco.Core/Manifest/PackageManifestReaderTests.cs b/tests/Umbraco.Tests.UnitTests/Umbraco.Core/Manifest/PackageManifestReaderTests.cs
index db23529c67..ff69213b3e 100644
--- a/tests/Umbraco.Tests.UnitTests/Umbraco.Core/Manifest/PackageManifestReaderTests.cs
+++ b/tests/Umbraco.Tests.UnitTests/Umbraco.Core/Manifest/PackageManifestReaderTests.cs
@@ -186,8 +186,9 @@ public class PackageManifestReaderTests
             .Setup(f => f.GetEnumerator())
             .Returns(new List<IFileInfo> { CreatePackageManifestFile(content) }.GetEnumerator());
 
-        Assert.ThrowsAsync<JsonException>(() => _reader.ReadPackageManifestsAsync());
-        EnsureLogErrorWasCalled();
+        var exception = Assert.ThrowsAsync<InvalidOperationException>(() => _reader.ReadPackageManifestsAsync());
+        Assert.NotNull(exception);
+        Assert.IsInstanceOf<JsonException>(exception.InnerException);
     }
 
     [Test]
@@ -202,8 +203,9 @@ public class PackageManifestReaderTests
             .Setup(f => f.GetEnumerator())
             .Returns(new List<IFileInfo> { CreatePackageManifestFile(content) }.GetEnumerator());
 
-        Assert.ThrowsAsync<JsonException>(() => _reader.ReadPackageManifestsAsync());
-        EnsureLogErrorWasCalled();
+        var exception = Assert.ThrowsAsync<InvalidOperationException>(() => _reader.ReadPackageManifestsAsync());
+        Assert.NotNull(exception);
+        Assert.IsInstanceOf<JsonException>(exception.InnerException);
     }
 
     [Test]
@@ -224,8 +226,9 @@ public class PackageManifestReaderTests
             .Setup(f => f.GetEnumerator())
             .Returns(new List<IFileInfo> { CreatePackageManifestFile(content) }.GetEnumerator());
 
-        Assert.ThrowsAsync<JsonException>(() => _reader.ReadPackageManifestsAsync());
-        EnsureLogErrorWasCalled();
+        var exception = Assert.ThrowsAsync<InvalidOperationException>(() => _reader.ReadPackageManifestsAsync());
+        Assert.NotNull(exception);
+        Assert.IsInstanceOf<JsonException>(exception.InnerException);
     }
 
     [TestCase("This is not JSON")]
@@ -236,20 +239,11 @@ public class PackageManifestReaderTests
             .Setup(f => f.GetEnumerator())
             .Returns(new List<IFileInfo> { CreatePackageManifestFile(content) }.GetEnumerator());
 
-        Assert.ThrowsAsync<JsonException>(() => _reader.ReadPackageManifestsAsync());
-        EnsureLogErrorWasCalled();
+        var exception = Assert.ThrowsAsync<InvalidOperationException>(() => _reader.ReadPackageManifestsAsync());
+        Assert.NotNull(exception);
+        Assert.IsInstanceOf<JsonException>(exception.InnerException);
     }
 
-    private void EnsureLogErrorWasCalled(int numberOfTimes = 1) =>
-        _loggerMock.Verify(
-            x => x.Log(
-                It.Is<LogLevel>(l => l == LogLevel.Error),
-                It.IsAny<EventId>(),
-                It.Is<It.IsAnyType>((v, t) => true),
-                It.IsAny<Exception>(),
-                It.Is<Func<It.IsAnyType, Exception, string>>((v, t) => true)),
-            Times.Exactly(numberOfTimes));
-
     private IFileInfo CreateDirectoryMock(string path, params IFileInfo[] children)
     {
         var directoryContentsMock = new Mock<IDirectoryContents>();