Exporting video with Loudness Normalization produces empty error window

I fixed this error - of course without help from Adobe as usual - 

the trick is to add another 2 channels under effects (scroll down from audio normalisation) hit the PLUS sign, I added two more stereo channels. I didn't even tick 'process'.

Resulting file has 2 audio channels (as selected under main audio tab) presumably normalised. 

I am still getting this problem in Oct / almost November 2025 - has it been fixed in an update? I am on 25.6.0 Beta Build 21

The audio normalization effect only functions if you are exporting a file with the same channel configuration as the source.

However, when attempting to export media with the audio normalization effect applied in cases it cannot function (for example exporting a 4ch source to a 2ch output), it fails as expected but a confusing error message is displayed:

Steps to reproduce:

1. Create a multichannel sequence (for example using a broadcast preset) and add some media; or import media with multichannel audio (tested with Canon XF-AVC with 4ch mono audio)
2. Select the sequence or media, and go to export tab
3. Select any format (tested with MXF OP1a ProRes, h.264, and HEVC)
4. Ensure audio > basic audio settings is configured such that it is different from the source, for example 2ch stereo if the source has 4ch
5. Go to the effects setting and enable the audio normalization effect
6. Click export, and it fails with the above error message displayed

Exporting through AME instead gives a much more helpful error message in the log that actually explains what went wrong - would be helpful for Premiere to say so too!

-------------------------------------
The Operation was interrupted by user
-------------------------------------
 - Encoding Time: 00:00:00
05/02/2025 10:22:36 AM : Encoding Failed
------------------------------------------------------------
Adobe Media Encoder
Loudness normalization failed as the number of channels in the audio channel configuration Stereo does not match the 4 channels provided by the source.
Export Error

Tested in 25.2.3 with extensions disabled, on Windows 11 24H2

I've been using premier pro for years, since i updated it I cant export anymore. As soon as i click export i get the attached message immeditily. It doesnt even try to export it, just gives me the error message. Been searching for a fix but getting no results. There is no info on the error message, just this blank !  I need to get this fixed and premier hasnt released a new update to fix it in ages! Anyone else had this issue?

Im using a mac Studio M1 Max so my machine should have fly through this.

Please help.

Ok good to know. Thank you very much for your help!

Updating Status

Going deeper into the troubleshooting, I discovered the sequence was created with one of the new broadcast sequence presets, so the channel configuration was all screwed up. This leads Loudness Normalization to fail - and I wish the error message would have described that.

Thank you Rach! I will keep this in mind. I actually narrowed down the issue: the error occurs when using Loudness Normalization in the export settings. Very odd. Turning it off allows the export to proceed as expected. 

Hi @john_2850 

Welcome to the Premiere Pro forums! We are glad to see you here. Thanks for all those screen shots they are definitely helpful.  We need a few more details to try to help with the issue. Please see, How do I write a bug report?

Thanks for submitting your bug report. I hope we can help you soon. Sorry for the frustration! 

Thanks,
Rach