I accidentally disechant 2 items and go to the page to return and write to me (An error has occurred while trying to restore items). i have disenchant items on mine backpack and i cant back
Try with another browser and/or after you clear the browser cache/cookies.
Also make sure you have everything you need, including residuum if you disenchanted azerite armor.
Usually this is if you don’t have the mats in your main backpack.