Question: I have SDK version 25, when i import a project in android studio this error occurs. 

> 
> "Install missing platform(s) and sync project".
> 
> 
> 

If I click this link, I get another error, which says:

> 
> "The following packages are not available: - Package id
>  platforms;android-23".
> 
> 
> 

[sdk error](https://i.stack.imgur.com/hY1P2.png) 

[my SDK version](https://i.stack.imgur.com/8e89N.png)

Answer: 
This can happen if you are using an Anaconda virtual environment and did both `conda install pyqt`(1) *and* `pip install opencv-python`. This creates a conflict between the two PyQt versions (`opencv-python` ships with its own) and causes the errors.

The solution is to install PyQt via `pip`, i.e. `pip install PyQt5`.

---

(1) Or anything that depends on `pyqt`, e.g. `conda install matplotlib`.
The issue is with OpenCV version, The following version solved all issues for me.

```
pip uninstall opencv-python
pip install opencv-python==4.1.2.30

```

I am using - Python 3.8.5 with conda

I tried with upgrading pyqt too but it didn't work