Learned feature extraction from deep neural (LSTM) network. LSTM is written for sequence to one regression.

I am using LSTM network for sequence to one regression. I want to find out the learned features. If I use "Activiations" command I get an error "SeriesNetwork.activations does not support recurrent neural networks." Is there any way to find the learned features? Please note that my data is not an image so I cannot use deepDreamImage.

Also, is there any support community for deep learning (CNN and LSTM) in MATLAB NOT focused on images or time series. Thanks in advance.