Disappearance of the Email field in the comment form.

Hello, First, I’m sorry my english is very bad, and I use Google translat I have a little problem, and I can not find solution. When a person leaves a comment it has the following error message ERROR: please fill in the required fields (name, e-mail). And indeed, two fields have disappeared, the field “e-mail” (Required) and the field “Website” for an unknown reason O_o whether on Chrom or Firefox I gave the default theme (Twenty Fifteen), no problem, the two fields Website and e-mail appear well. I also disable all extensions (plugins), and handed the “Simple Catch” theme, but the result is the same; No field Website and e-mail Can you help me please