Things to check and try first

Things to check and try first
Common Tiki Problems

If you are having problems with your Tiki, here a number of things that you should review and try first:

Check release notes for your version and the previous ones — is this a known issue?.
Check the reported bugs — is this a reported issue?
Are you running latest stable version? Your Tiki version is shown on the General Admin page.
Is database out-of-date? Starting in version 3.0, Tiki will report a Database Version Problem message on the Admin Panels if your database requires an update.
Is your database corrupt? See Repair database for details.
Clear all Tiki caches by selecting Admin > Tiki Cache from the menu.
Deactivate GZIP, Minify, and other options in the Performance admin panel
Deactivate Clean URLs (especially if you are on Windows IIS server).
Clear your browser's cache by using Ctrl+F5. Refer to your browser's help system for details.
Clear your browser's cookies. Refer to your browser's help system for details.
Try another browser, such as Firefox, Internet Explorer, Safari, Chrome, or Opera.
Check your web server's error log. Any file or folder permission problems are commonly shown in the log.
Are your Tiki file and folder perms configured properly? If you have shell access to the server, use sh setup.sh.
Attempt to log out of your Tiki, then log in again.
Check integrity of your files.
Have you added any custom entries to the .htaccess file? Temporarily comment them out.
If you changed a server setting, did you restart Apache?
Change the theme (especially if you are using custom theme). See Tiki Themes for details.
Try to reproduce the problem on a Tiki demo site. If you can reproduce, then, please report a bug.
Enable the Tiki debugging features by applying the Debug Mode Profile.
Check in MySQL for the table tiki_actionlog to see what the latest changes were before the issue started.

Common Tiki Problems

Be sure to review the Tiki FAQs for answers to frequently asked questions.

Locked out of Tiki

...and I can't go to profiles to enable Debug Mode
Try:

Access your database (by using phpMyAdmin or the equivalent).
Find the table tiki_preferences.
Edit the values from above.

Item: error_reporting_level
Value: 2047

You should also empty the Tiki cache or manually delete all *.tpl files in the ../templates_c/ directory.

Blank pages

The most common cause of a blank screen in which Tiki shows no error message and no content is insufficient PHP script execution memory. Tiki requires minimum of 32MB. (which you can change in php.ini or httpd.conf. If you are using APC, XCache or eAccelerator, make sure they also have enough memory.

Also make sure to activate your error messages.

Review your tiki-phpinfo.php page or contact your server admin to make sure your site meets this requirement. See Requirements for details.

Internal server error

This could because of incorrect File and Folder permissions.

Forgotten admin password

If you have lost or forgotten your Tiki admin password, see
Lost admin password.

Broken theme

If you customized a Tiki theme and now have problems, see Template Tricks on Tiki Themes.

Module breaks site

If you created or edited a module and included invalid or poorly formatted syntax, Tiki may display errors. Access your database (for example, by using phpMyAdmin) and remove the offending module from the tiki_modules table. Please note that you can easily re-instate via the admin panel after, as it is not deleted but just unassigned.

Missing or corrupted files

If you are getting weird error messages that no one else seems to be getting, it could that your upload didn't complete properly. So you are missing some files or they are corrupt. The solution is simple: reupload the files. Check file integrity