Perhaps it loads JQuery as the theme is loading it?
Can you replicate the problem using the default Twenty Twelve theme with all other plugins deactivated?
This is my clients website, travel agency, there is no way I can deactivate all plugins and switch to other theme 🙁
There is no magic bullet in these situations. This is just the start of basic troubleshooting and is a process of elimination deliberately designed to locate the root cause as quickly as possible by first removing the most obvious and common culprits via a series of (often) temporary steps.
Do you want to locate and, hopefully, fix the problem on your site? If “yes”, then please help us to help you and carry out the changes that we suggest.
Hi,
thanks for your post, and sorry for the late answer. As I was on vacation, I didn’t have a chance to reply earlier.
Yes, this is most likely a JavaScript conflict. Either another plugin or the theme is inserting its own JS into the TablePress admin pages (which it should not do), or the theme is loading an old version of jQuery (which it also should not do).
esmi’s suggestions are the best way to proceed with this. Another idea is to investigate the page in the Google Chrome Developer Tools, to see if there are JavaScript error messages reported in the console.
Regards,
Tobias