I have a form which is rendered from a View Component and posts to a Surface Controller. When it's done what it needs to, the Surface Controller tries to do a

return CurrentUmbracoPage();

But fails with the above error. Is there something about it being instigated from a View Component rather than a Razor page directly?

I'm speculating, but I think this might be because you're using

Html.BeginForm

as opposed to

Html.BeginUmbracoForm

. The latter likely adds some additional data to the request that that method consumes

Currently doing

return RedirectToUmbracoPage(formErrorPageId);

with the Guid of the page I want to hit, but it's ugly

I see, I don't know anything about that unfortunately

If it is a bug in .net then Umbraco should probably re-work the BeginUmbracoForm or give us a work around if there is one.

Perhaps the weakly typed alternative works better?

Html.BeginUmbracoForm("submit", "MyFormController")

Think I tried that already, but willing to give it another go......

400 usually means that the controller is found, but the parameters are off. The response often gives indications what's missing or else it might be a csrf-token thing that messed up somehow.

I will dig out an example of what I'm doing tomorrow, what umbraco version ?

Thanks, umb 10.6.1. I'm on Linux and I've checked the casing is correct, as that's usually the problem. But unless it's a casing issue in the Umbraco itself (wouldn't be the first time) it should be working.

I had issues with forms in viewcomponents, answered here https://discord.com/channels/869656431308189746/1137396880985297028