ModuleNotFoundError: No module named 'selenium.webdriver.chromium'

 The `ModuleNotFoundError: No module named 'selenium.webdriver.chromium'` error usually occurs when the "chromium" webdriver is not installed or it is not installed properly. Here are a few things that you can try to resolve this issue:

1. Install the "chromium" webdriver using pip: You can try installing the "chromium" webdriver using the following command:

   ```

   pip install selenium.webdriver.chrome.service

   ```

   This should install the "chromium" webdriver and resolve the issue.

2. Check the version of Selenium: You can check the version of Selenium that you have installed on your system using the following command:

   ```

   pip show selenium

   ```

   If the version is lower than 3.0, you should update it to the latest version using the following command:

   ```

   pip install -U selenium

   ```

3. Check the system PATH variable: Make sure that the path to the directory containing the "chromium" webdriver is added to the system PATH variable. You can check the system PATH variable using the following command:

   ```

   echo $PATH

   ```

   If the path to the directory containing the "chromium" webdriver is not in the system PATH variable, you can add it using the following command:

   ```

   export PATH=$PATH:/path/to/chromium_webdriver_directory

   ```

   Replace "/path/to/chromium_webdriver_directory" with the actual path to the directory containing the "chromium" webdriver.

I hope this helps!