我和你有同样的症状，同样的环境.(这导致我从 Google 提出这个问题).

I had the same symptoms as you, same environment. (which what led me to this question from Google).

我通过清除本地主机的数据解决了这个问题.我认为这与 cookie 有关.

I solved it by clearing localhost's data. I believe it had to do with the cookies.

在清除之前，我认为我的数据库已损坏，所以我尝试使用 mysql cli 进行一些删除/更新操作.它工作得很好.所以它是 100% 来自 PhpMyAdmin 的，在这种情况下，清除 cookie 对我有用.

Before clearing, I thought my database was corrupted, so I tried to do some drop/update operations using mysql cli. It worked fine. So it was 100% from PhpMyAdmin's side, and in this case, clearing the cookies worked for me.

至于是什么导致这个问题:不知道！

As for what caused this problem: No idea!