We've gotten a few reports regarding the [Event] Revolutionary Uniform (1-Day) & [Event] Loyalist Uniform (1-Day) costumes. These are only based on collected information.
1. Despite being labeled as (1 Day), they don't seem to expire.
2. They cannot be sold to NPC, they cannot be destroyed either. So they continute to fill up precious bag space. You can write a request to Support to delete excess costumes you don't want/need. Or you can also temporarily turn of your pet's auto loot function, so you don't get more costumes. These are optional, of course.
3. Both costumes seem to cause issues when worn by Female Xenoa characters. It will cause your client to crash, and you will get the Requiem.exe error. So far, the confirmed job classes that are affected are Avenger, Elementalist, and Ranger. Though some say that all of the Female Xenoa Job Classes are affected. You will need to send a ticket to Support to regain access to your affected character. I also suggest to refrain from wearing these costumes on your Female Xenoa until a permanent fix is applied, so you can avoid the Requiem.exe error and continue playing with your character. Other characters may also be affected by the Requiem.exe error if they are on the same screen as the affected Female Xenoa on the character selection. Once the affected character is fixed, you should be able to access your other characters normally.
*There is another Requiem.exe error surrounding the costumes, but it is still unconfirmed if Transmogrification/Costume Swap has anything to do with it. Unfortunately, Support doesn't seem to be able to fix this one, and if you are experiencing this error, you will need to wait for it to get fixed.
This is what we know so far, and the suggestions listed here are just that, suggestions. It is still your choice if you want to try it or not.
Feel free to add your input, but I request that everyone keep their responses constructive and beneficial to finding out details of the issues listed here. These have been reported to the Requiem Team already, and this post is intended to give out suggestions to players, and temporary workarounds until the issues get resolved. Any and all destructive and unrelated comments will be deleted without warning.