Well your post is way too long to answer but most of the problems you have look like a permission problem of the /home/user/.yappari folder (maybe you recreate it using the root account and you shouldn't). Problems 1, 2 and 3 don't happen to me.

Last seen is not implemented yet.

RTL languages are not supported.

etc.

Remember Yappari is in the repository so you people can grab the source and implement what you want and send me a patch.