User is getting the below issue when opening the script in studio 11.
This will occur when there are many conditions in the 10x script and on disabling the option "hide all disable fields" from filter option. We will notice for few conditions the beginning of the condition is present but not the end IF condition icon.
This is a Bug in 10x. As a workaround disable "hide all disable fields" and remove the IF condition which do not have end IF and try opening in 11x.