Update install_paula.md

Author: haesleinhuepf

docs/00_setup/install_paula.md

@@ -31,7 +31,7 @@ conda activate genai-gpu
 
 Make this conda environment available to Jupyter hub like this:
 ```
-python -m ipykernel install --user --name 'genai-gpu' --display-name "ScaDS.AI genai-gpu"
+python -m ipykernel install --user --name 'genai' --display-name "ScaDS.AI genai"
 ```
 
 To make stackview work, install it outside the conda environment:
@@ -51,6 +51,20 @@ conda activate genai-gpu
 pip install other-package 
 ```
 
+## Troubleshooting
+
+In case the Jupyter Kernel doesn't work and/or needs to be removed, you can check if it's installed by printing out the list of installed kernels:
+
+```
+jupyter kernelspec list
+```
+
+And you can uninstall them using this command:
+
+```
+jupyter kernelspec uninstall genai
+```
+
 ## Read more
 
 These instructions were derived/modified from [this page](https://www.sc.uni-leipzig.de/05_Instructions/Jupyter/#how-to-use-your-own-environments-and-kernels).