Hello,
Need check translate methods what you use.
If you use free SefTranslate version and redirect, you need check web page structure for pages where you see errors, also please check browser Error Console
If you use free SefTranslate version and aJax, you need check all what I wrote before and also your translate quota
If you use Pro SefTranslate version, for aJax - you need check as I wrote before.
For redirect also as I wrote before and your translate quota, also you may check set in component different translate algorithm
Thanks,
OrdaSoft team