Can not register Admin user

Hello I have just installed the latest version of Grav on the latest version of Wamp. The homepage redirects me to the admin account registration from where i can't continue.

After filling-in the fields, (not using special characters, length in 4-10 char, no numbers, no capital letters etc) just receiving the following error:

Oops there was a problem, please check your input and submit the form again

whar is wrong?

sorry.. found the root cause: registration form works only under Chrome, it just does not compatible with IE11.

That would be strange! Going to check