Whenever an unhandled error occurs, I get following screen instead of yellow screen.
Please note I have enabled Localization in ASP.NET Boilerplate and current language/culture is set to en-US.
For some pages, the language text values are stored in AbpLanguageTexts table.
This is happens when the page is send back with gZip compression but with wrong Content-Length.
The result are the non-correct decompress of the data.
The solution is to remove the Content-Length or remove the compression from the error page/message.
You can also check this similar answer : HTTP Compression: Some external scripts/CSS not decompressing properly some of the time
