The cause of the mentioned problem is incompatibile code with installed tensorflow library. In this case you have code compatible with tensorflow 1.0 version but installed tensorflow 2.0 or higher. Let's see what you can do to solve the problem.
Unresolved reference issue is one of the most common problems that novice programmers face. The following article describes possible causes and solutions for the issue.
This is a solution for an exception occurred when you try to run Node.js application required Oracle Database.
This is a solution for an exception occurred when you try to run any gradle task using an outdated Gradle version.