IMPORTANT: Before opening a support ticket
1. Disable all other plugins, but Ajax Search Pro, then check if the problem persists
In many cases issues are caused by 3rd party plugins directly. This will help you identify the possible faulty plugin. Tell the support staff which plugin you suspect, and they will help you debugging the problem – if possible.
If step 1. didn't work:
2. Switch your theme to the default, check if the problem persists
If so, then there is most likely an incompatibility issue with the theme. Tell the support staff this information, they will help you identify and fix the problem.
3. Re-install the plugin
Sometimes plugin installations can fail, and can result in missing files. Make sure to re-install the plugin to avoid this issue.
4. Enable debug mode in WordPress
Debug mode will force to print possible error messages to the front or back-end. Here is a guide on how to do it. These are very important for fixing a possible issue.
If any of these steps resulted in a change, don't hesitate to share it with the support staff.