This is interesting. I recall this issue coming up, but believed we had solved it. What verison of PHP are you using? Let me know, and I will take a look into it.
In the meantime you can suppress such messages on the server side, either via php.ini or .htaccess. It is only an error, which is less severe that an error in PHP.
Version information: 188.8.131.52
Ignore previous version. See info. below:
PHP Version 5.4.45
Willpro, OK, the first thing to note is that warnings are not a major problem, and can be suppressed in php.ini. Gibbon used to have a lot of these warnings, and a few years ago we had a major push to clean them up. Most are now gone, but a few remain (as you have found out). When reported, we aim to fix them. But we still recommend running with with warnings off.
The warning you are encountering should be fixed in this commit, which is backwards compatible to v11:
Let us know if it solves the problem.
|//Set timezone from session variable|
Willpro, you would not see it in your version, as you are on v11, and what I sent you is from the development branch for v12. Glad to hear it works!