表格中缺少价值？

Whenever I try to create a new table with this...

CREATE TABLE IF NOT EXISTS `users` (
`uid` int(11) NOT NULL AUTO_INCREMENT,
`email` varchar(300) NOT NULL UNIQUE,
`password` varchar(300) NOT NULL,
`activation` varchar(300) NOT NULL UNIQUE,
`status` enum('0','1') NOT NULL DEFAULT '0',
PRIMARY KEY (`uid`)
)

I get a pop up that says. Missing value in the form!. I've tried looking for answers, but most of them say to disable Ajax, which I cannot do. I've also tried different browsers and nothing seems to work. I'm using phpMyAdmin 4.1.6

varchar must have no more than 255 character, and you set is 300 character

look at this ( https://dev.mysql.com/doc/refman/5.0/en/char.html )