In the following two cases, DEDE background logic is blank:
1. config. cache. inc. php in the data directory is lost.
2. The data directory has no write permission.
Because you do not have the directory write permission, the php page cannot be written into the cache during the loading process, resulting in blank pages.
Solution:
When the background is blank, do not change the php file first. First, check the directory permission. The reason for the directory write permission may be that the space is unstable, or you may set an error during the dede upgrade process, first, you must determine the write and execute permissions for the data directory.
The password may be incorrect. We can try the following solutions:
The solution is also simple: you only need to set the data/common. inc. php
Ps: use Dreamweaver or editplus to change the host name and database account password to the same space.