Default Need help please

Hey, I recently started to use Multirom ROM, and its really helpful. However, I flashed Dirty Unicorns ROM today and then my primary ROM (Android L) started playing up. When I take a screenshot, it says "couldn't save screenshot. Storage may be in use" and I can't see my photos, Titanium backup gets stuck on loading Application data, multirom manager just stops working. So I thought the liable action would be to fresh restart and hence, I wiped data, system, cache and dalvaik cache, and also uninstalled multirom. So then i flashed Android L by itself with no multirom. After I set everything up, it still came up with the issues stated above. So I restored from a nandroid backup to Mahdi ROMs I did a while ago, it works fine. But then I flashed Android L, and the problem came back again. Is there any way to fix this? Thanks a ton.

Tl;Dr I flashed dirty unicorn's as secondary ROM and primary ROM (android L) can't use my internal storage, even after a fresh wipe.

Thanks again