If you can't find the culprit or if you cannot edit the content anymore, you can '''delete the content:'''
Open the page without any content and add '&noload=all' to the URL of the menu page. then SAVE
Example:
will open SETTINGS-> BOOKING PAGE - > PAGEDESIGN - > CONTENT with all content removed.
Then click SAVE.
The settings will be empty so you can enter your valid content and save.
...beds24.com/control2.php?pagetype=bookingpagedesigncontent&noload=en
If the corrupted content is in a <b>popup window</b> (for example in the email content of an auto action) then do this:
1.) Open the auto action and go to the 'Email' tab.
2.) Click the blue link at the top: 'Open in a new window' (unless you have the system set to open popups in a new tab; then you can leave out this step).
3.) Add '&noload=all' (or '&noload=xx where xx = language) to the end of the address (URL). Hit Enter.
4.) Hit the blue 'Save' button.