unable to save any changes

Hey
What version of Seatreg plugin are you using?
Do you have access to server error logs? Might give some ideas what is happening.
Have you made any changes to Seatreg settings? Can you go over the settings and see if inputs look okay (there was an issue where escaped characters were added to inputs).
What version of PHP are you using?

Am using this Version 1.56.6 all what i want to change only to increase the Max seats per booking from 1 to 2 i didn’t made any changes in the settings even i unable to rename the Registration name for any party.

I updated plugin to version 1.56.7. Now it should produce better logs when updating settings failed.

I have the same version please find the link below link screenshot

https://drive.google.com/drive/folders/1Kbp4klpF7YV0W7jL8Ul04zwvN9xnL_I-?usp=drive_link

Can’t access item. The organization that owns this item doesn’t allow you to access it.

https://www.dropbox.com/scl/fo/xvbu5d4zut599ld3j9tjg/AE-aQVq2BXgc8p4YPcK5gS4?rlkey=tsa003ak0vfqok3cy9dh83fq1&st=rys2r3mo&dl=0

The issue is at the server side. You should look at the server error logs.