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Tag: errors

127 posts · Page 9 of 13

2026-06-14 errors flutter dart

Fix: Looking up a deactivated widget's ancestor is unsafe in Flutter

This crash means you called context.of() after the widget left the tree, usually in an async callback or dispose(). Capture the value before the await, or in didChangeDependencies().

2026-06-13 errors dotnet httpclient

Fix: The SSL connection could not be established with HttpClient

The inner AuthenticationException tells you the real cause: an untrusted chain, a name mismatch, or a TLS version gap. Trust the cert, fix the host name, or align protocols. Do not blanket-disable validation.

2026-06-12 errors aspnetcore dotnet

Fix: The antiforgery token could not be decrypted in ASP.NET Core

The error means Data Protection lost the key that signed the token. Persist keys to a shared, durable store and call SetApplicationName so every instance reads the same key ring.

2026-06-12 errors csharp dotnet

Fix: The entity type 'X' requires a primary key to be defined in EF Core 11

EF Core can't find a key for your type. Either name a property Id or {Type}Id, add [Key], call HasKey, or - if it is a view or raw SQL result - call HasNoKey.

2026-06-10 errors csharp dotnet

Fix: The configured execution strategy 'SqlServerRetryingExecutionStrategy' does not support user-initiated transactions

EnableRetryOnFailure conflicts with BeginTransaction. Wrap the whole transaction in db.Database.CreateExecutionStrategy().ExecuteAsync(...) so it retries as one unit.

2026-06-09 errors blazor dotnet

Fix: its render mode is not supported by the parent component's render mode (Blazor)

You put @rendermode on a child whose parent is already interactive. A subtree has exactly one render mode. Remove the child directive or move it to the boundary.

2026-06-03 errors flutter dart

Fix: RenderBox was not laid out in Flutter

RenderBox was not laid out is almost always a secondary error. Find the first layout assertion above it, usually a scrollable given unbounded constraints, and fix that.

2026-06-03 errors flutter dart

Fix: A TextEditingController was used after being disposed in Flutter

This crash means code touched a controller after dispose() ran. Guard async callbacks with a mounted check, and never dispose a controller you do not own.

2026-06-02 errors csharp dotnet

Fix: ObjectDisposedException: Cannot access a disposed context instance

Your fire-and-forget task captured a request-scoped DbContext that the DI scope already disposed. Resolve a fresh context inside the task with IServiceScopeFactory or IDbContextFactory.

2026-06-02 errors flutter dart

Fix: setState() or markNeedsBuild() called during build in Flutter

This error means you mutated state while Flutter was building. Move the setState out of build, or defer it with addPostFrameCallback. Here is why it happens and the right fix.