Add troubleshooting document detailing several issues people can encounter while building the project.

Readme.md

@@ -19,9 +19,13 @@ Then,
 
 For either of those to work, Game Assets has to be built.
 
+Look at [the troubleshooting document](docs/Troubleshooting.md), it includes several common issues and how to fix them.
+
 ## Dependencies
 
-On your build environment, for scripts to work, you need to install these
+On your build environment, for scripts to work, you need to install these.
+
+**NOTE**: You will need to use the Python 2 pip.
 
 ```
 pip install git+https://github.com/desertkun/hjson-py
@@ -92,4 +96,4 @@ please join the Dev Support telegram channel below and ask for invite link.
 If you have development question, please join
 [Dev Support](https://t.me/+f8ha1XpCJS1mZmUy) group on Telegram.
 
-Otherwise, feel free to join the [Official Discord Community Server](https://discord.gg/eeqyjeG7P5)
+Otherwise, feel free to join the [Official Discord Community Server](https://discord.gg/eeqyjeG7P5)

docs/Troubleshooting.md

@@ -0,0 +1,34 @@
+## Run configurations not available
+
+1. Close project
+2. Delete `.idea`
+3. Run `./gradlew idea` in root folder
+4. Open project using `brainout.ipr` file
+
+## Class not found in module
+
+![](ModuleError.png)
+
+1. Set `brainout.[modulename]` to `brainout.[modulename].main`
+2. Repeat with each run configuration.
+3. Click `Apply`
+
+## "…dxRuntimeException: Error reading file: mainmenu…"
+Make sure you have run the create data script successfully.
+Check if all dependencies are installed correctly.
+
+| Platform | Script          |
+|----------|-----------------|
+| Windows  | `make_data.bat` |
+| Linux    | `make_data.sh`  |
+| MacOS    | `make_data.sh`  |
+
+## Python Issues
+You will need to use Python 2 and the Python 2 version of pip.
+
+## `make_data.py` TypeError
+1. Make sure hjson is installed
+```shell
+pip install git+https://github.com/desertkun/hjson-py
+```
+2. Make sure that the desurtkun's fork is used instead of the default package if you have that installed already.