One Plus One - CM11 - Failing to complete OTA
The error is telling you that it won't apply because the system you currently have doesn't match the base that the update is meant to apply to, because you've updated this file. Don't keep trying to apply the update: if you can somehow circumvent the check and flash the update anyway, the result will be a broken OS.

If you still have the original ContactsProvider.apk file, restoring it will allow the update to apply.

If you can't restore the original ContactsProvider.apk, then you won't be able to apply any further updates. You need to download a complete Cyanogenmod image and flash that. OTA updates will then work again, so long as you don't edit any more OS files.