File upload problem

problem withe a hosted wordpress site

Try contacting your hosting provider and discussing the issue with them.

Also try reviewing: https://github.com/SpiderLabs/ModSecurity/wiki/Reference-Manual-%28v2.x%29#MULTIPART_UNMATCHED_BOUNDARY

Hello, thanks for your answer.

I already contacted my provider.. He told me the upload constraint was 128MB. So that may not be the problem. You wrote i culd review github. As far as i understand this should be a problem than in the core of WordPress. Or is this a problem on the serverside, and should i contact my provider about this?

With kind regards, Rolf