juanmlg Posted July 5, 2015 Share Posted July 5, 2015 (edited) Hello, I am going to explain the problem. I am using presta 1.5.3, today I noticed that when I tried to enter in the module tab in backoffice it loads with blank page, after turn the errors on I get: [PrestaShop] Fatal error in module index: Cannot modify header information - headers already sent by (output started at /home/xxxxx/public_html/xxxxxxxx/tienda/modules/dboptimization/dboptimization.php:2) dboptimization is not a really important module to me so I delete the folder via FTP trying to solve the problem, but it didn't work, the error disappeared but now the Module tab links me to my store homepage, so I can't access to module section. I have try to delete the cache, but no luck. Please can anyone help me, I really need to solve it Edited July 6, 2015 by juanmlg (see edit history) Link to comment Share on other sites More sharing options...
vekia Posted July 5, 2015 Share Posted July 5, 2015 hello im affraid that it's not a case of dboptimization take a look on this part: [PrestaShop] Fatal error in module index try with this: go to adv. parameters > performance and turn on option to disable all non default modules (this is for test purposes only) 1 Link to comment Share on other sites More sharing options...
juanmlg Posted July 6, 2015 Author Share Posted July 6, 2015 Hi Vekia, thanks for your support by email and here, at first I thought that was a dboptimization problem because the module name appears in the error but after a few hours checking and reading a lot I discovered a similar problem caused by an "official" prestashop module called "powatag". I haven't installed this module consciously but looks like for some reason it installed itself. After delete the folder /modules/powatag my presta works again like a charm. So if someone have a similar problem, check inside your module folder and rename powatag folder Link to comment Share on other sites More sharing options...
vekia Posted July 6, 2015 Share Posted July 6, 2015 thank you for informations! i marked your answer as a solution to this problem hope that prestashop will fix this free addon quickly to avoid troubles like you had! Link to comment Share on other sites More sharing options...
juanmlg Posted July 6, 2015 Author Share Posted July 6, 2015 I have disabled the Powatag banner from backoffice to avoid future problems... Only comment this code in: admin/themes/default/template/controllers/home/content.tpl <div id="partner_preactivation"> <p class="center"><img src="../img/loader.gif" alt="" /></p> </div> I hope it will be helpfull for someone Link to comment Share on other sites More sharing options...
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