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The method of renaming the file later failed, but fortunately the method of changing the code worked.

The problem has been solved, your suggestions were very helpful.

I'm still using version 2.6. I've tried versions 2.8 and 2.15, but they both fail to install, displaying "Extension Update: Custom install routine failure. Error installing component" My Joomla version is 5.3.4. Does anyone know what's going on?