I had a issue with tapatalk, I had to delete the plugin and the folders within my root FTP in order to get it to work.
I'm curious as to if this would resolve @maidos and @Francisca Canovas problem. It may not, though it's worth mentioning because I removed the plugin, I tried older versions (including the version which worked before) and yet only until I delete the folder within the plugin did I manage to resolve it.