update to 9.01, "HTTP ERROR 500" error

Posted in: Newspaper
Post count: 27

I’m using 8.8.2 now. When I upgraded the theme to 9.0.1, the theme home page prompted me to install the “tagDiv Composer” plug-in. When I installed it, there was a “HTTP ERROR 500” error. At this time, the front desk of the website can be opened, and the background can not be opened.
What can I do?

Post count: 27

I found that the tagDiv Composer plugin could not be enabled.

Post count: 27

I’ve disabled all the plug-ins, solved the above problem, and installed 9.0.1, but the theme thumbnail in Appearance is still 8.8. Why is that?9.0.1
8.8

Post count: 27

Thumbnails have also changed. There is no problem.

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