Originally Posted by red rage
thanks so can i just use that zip without his rom ?
Not sure if that would work; since Bonestock ROM is deodexed and if you are on stock odexed, you will need an".apk" and corresponding ".odex" file to install the missing (MyTask) package.
The reason I had this issue is while debloating, I had removed MyTask app.
Could you please check if you have MyTask.apk (should be /system/app/ folder)? If its not there, you could flash it back (from your backup, perhaps?)
If it is already present, then the error is caused by something else. In this case, you will need to wait for an "expert" to respond here.