What the actual meaning `Caused by: java.lang.RuntimeException: view must have a tag`?

Question

Please inform me if knowing whats tag that wanted.

Caused by: java.lang.RuntimeException: view must have a tag

__BaseActivity.java

Answer 1

This happened to me due to the library's layout file (the one for which the error was flagged) having the same name as another one in the app module. Both used data binding.