If TopNav is enabled according to the framework, the first page will be opened by default and an error will be reported.

1. Reasons

The first page opened by default is a submenu with empty content. The first page of the first submenu should be opened. 

 2.Code

 Find the corresponding location in the original code and add the following code

 

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Origin blog.csdn.net/m0_68428581/article/details/130706695