IIS ASP.NET - resource loader failed to find MUI file?

Tim,

Sorry for the delay, I didn't receive a notification about your post. I've answered you in the support ticket.

I have the same issue and didn't found solution for that yet.
Could you share it?

I'm getting the same error while running dotMemory. Could this be related to some recent Windows update?

We are currently investigating this issue. What display language is used in your system? If it is not English, could you please try to change it to English, then switch it back and check if the issue persists?

I submitted the issue on your bug tracker as well. I checked and I have the same issue with dotTrace. My display language is English, but I have Finnish as the first input language. I tried removing Finnish (so that only English is there), but the error persists.

i have the same problem, but changing the language to the original installed language solves the problem. when switching back to english(us) the error occurs again

Bernhard,

The problem is we can't get a text of the real error because IIS can't send it to us. It sends only "resource loader failed to find MUI file" error because it can't translate the original error.
Could you please do the following:
- Download and install the corresponding version (it must match the latest .NET Framework version installed on your machine) of a language pack for the second language which is used on your machine: https://dotnet.microsoft.com/download/dotnet-framework/net472 (this link is for .NET Framework 4.7.2, see the list of available versions on the bottom of this page);
- Reboot your machine;
- Check if the issue persists.

Hello, I tried everything but I am still getting the issue.

I would send something from event viewer, but nothing appropriate comes up.

David,

Did you try to reinstall IIS on your machine?

I certainly have not, ok, I will try that, I will be able to do that from programs and features right?

Yes, "Turn Windows features" in the "Programs and features" is the right way. Please restart your machine after turning the feature off.

Thereafter, we also recommend you to rename the folders C:\inetpub and C:\Windows\System32\inetsrv . Note that these manipulations will erase all your configurations on IIS.

Hello Ana,

I have

• Removed IIS;
• Restarted;
• Installed IIS back once I had en-US as default language;
• Rebuild Solution;

But I still get the same issue.

David,

The issue occurs with a certain application + OS + .NET Framework language combination. Unfortunately, we haven't been able to reproduce the same.

Could you please provide more information:

- What's your application language?
- What's the original language of this Windows installation?
- Please open Control Panel | Programs and features and make a screenshot with all .NET Framework installations. Something like this:

Well, originally it was en-gb, since I did not expect to have this kind of issue.

Currently my Windows language is changed to en-US.

My web application had en-GB as default culture, but I have changed that to en-US as well.

Here are my Microsoft installations:

I hope I won't need to re-install windows because of this.

David,

Thanks for the information, we'll try to create a similar configuration.

Hello Anna,

Hope this helps, if you'll need full tree, let me know and I will develop code to get it as list in txt files.

One additional note - I tried to run the performance profiler on Console app and it worked. So this narrows down problem to IIS.

If you will need to get more details we can also schedule a screen-sharing session if you'd like and proceed with that path.

Thank you!

David,

Hello Anna,

I have created the ticket.

I have this problem too. Just installed the latest updates of today but the error i still present when I try to Profile with dotTrace (launching from VS 2019).

Hi Johan,

I had calls with developers from R#, he debugged it, corrected, sent me the preview build, I tested it and it worked for me. but as far as I know it has not have been shipped in R# yet in public version.

Hope the fix which helped me, will help you too.

Johan,

This issue is fixed in 2019.2.3 version of dotTrace which will be released in a few weeks.

If you want to get the fix faster and use a pre-release version of dotTrace (and ReSharper Ultimate), please create a ticket in our support system (https://dotnettools-support.jetbrains.com/hc/en-us/requests/new) and I'll send it to you.

2019.2.3 version has been released today and is already available on our site. You're welcome to try this bugfix update if you still suffer from this problem.