Hi,Problem may be in uploading photograph and sign. We have to take care some important point in uploading photograph and signature..Photograph should be recent on or after 1 September 2018.Name and date of the photograph should be mentioned on the photograph.Photograph and sign should be in jpg or jpeg format.Photograph size should be in range of 10 kb to 200 kb and sign size should be in range of 4 kb to 30 kb.For more updated information regarding NTA UGC-NET December 2022. you can watch this video. Very informative and useful for all the NTA UGC-NET aspirants.All the best