我的症状与您相同，环境相同. (这导致我从Google提出了这个问题).

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来解决它.我相信这与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，因此我尝试使用mysql cli进行一些删除/更新操作.工作正常.因此，从PhpMyAdmin的角度来看这是100％，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.

关于导致此问题的原因:不知道！

As for what caused this problem: No idea!