This quest is included in the Daily Daily Quest which is highly recommended for you to complete because you can get the chance to get rare materials and equipment from here.
Here are rift / crack locations.
Rift fix is highly recommended to be done with a party. Because besides speeding up the fixing process, you will also be given a Friendship Card (exchanged with Mora's Coin, will be explained further in the Enchantment section) for each friendlist who is in one party when completing the rift.
Before being able to do Fixing Rift with a party, as a Party Leader you must have completed the Solo Rift Quest first. You will get the Fixing Solo Rift quest when you go to one of the rift locations above. You have to complete the Solo Rift alone, it can't be done in a party.
After you complete the Fixing Solo Rift, for example, just finishing at West Field Prontera, then you will open the Fixing Rift for the Party in the same location, West Field Prontera.
Note: This quest is only one time
Fixing Party Time Rift
Friendship card will not be explained here, these tips just want to let you know that you can grinding Friendship Cards by helping to complete a friend's Rift Fix that has not yet been completed but at risk you will not get any drop from Rift Fixing. Make sure your friend must be in the friendlist!