Bugs and error

Application is not working properly too much bugs and error .GIF files and IMG not supported

You don’t even mention which application isn’t working properly and you haven’t provided much information to go on for anyone to try and help you regarding your issues.
It sounds like you might need some more experience so I suggest that you check out Brandon Craft on Youtube for some excellent tutorial videos.

See this information for .GIFs

Also, take a look at Kustom Rocks website for more help.

You’re probably referring to KLCK. Your application has a lot of errors. The unlock button on the lock screen doesn’t work.