403 error - TPL_GK_LANG_ERROR_INFO TPL_GK_LANG_ERROR_DESC

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GK User
Sat Oct 25, 2014 1:26 pm
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Greetings. All of a sudden, there is a 403 error in my website. When an author is trying to add an image gallery (jw_sigpro) it shows the 403 error in the picture.

Image

That only happens in the frontend. The same error appears, now and then, when a user is trying to upload an image or post a video url in Kunena Forum. The only changes i made in the past few days is the template updates and some changes in robots.txt . I also checked the language file and they are correct. This is a serious problem for my site. What could be wrong?
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Sat Oct 25, 2014 1:35 pm
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I was wrong before. The error to only appears to authors but to super users too. I also fixed permissions with admin tools but the error persists. (sorry for double posting, i couldn't find an edit button)
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