No template as soon as I am logged

Hello Steve,
I went through the forum but did not see any explanation. The login page is OK but as soon as I am logged I have a white page with some text on.
My templates-c directory is writable.
Would you have any explanation ?
Thank you again
Jean
I went through the forum but did not see any explanation. The login page is OK but as soon as I am logged I have a white page with some text on.
My templates-c directory is writable.
Would you have any explanation ?
Thank you again
Jean