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There is not much info from the debugging. My only guess is that one of non-official modules had caused the problem.
If the site is brand new, I would re-install the whole XOOPS package, then install the non official modules, one by one followed by template manager testing. You also need to check if the modules that you are installing are compatible with XOOPS 2.0.6. Some modules could be made for 2.0.5 or lower version and have not been updated.
Other than that, I am sorry I don't have much to offer. Good luck and keep us posted.