this is our blog http://firstjoker.blogspot.in/ now if you open error come in admin panel i am going click in template section then also get the error in pop up can any one help me how to resolve this error ?
No. Simply because you haven't told us ANYTHING useful. The blog doesn't show. What you do then is you reset the blog to the bare minimum - remove themes, extra scripting etc. until it works. If it still doesn't work, do a back-up of the site (the database) - I'm assuming you can do this from the admin-panel, and start over, importing posts in smaller quantities, until it either keeps working, or you get the error again (which will tell you what caused the error). If none of these methods work or is possible, you contact blogspot and ask them for help.