Theano stuck 'Overriding existing lock by dead process'

Hi all, since yesterday I have this issue where I can’t run any pymc3 model on my laptop. If I try to run a model definition (not even the sampling) in Pycharm, I get a spam of the following error:

WARNING (theano.gof.compilelock): Overriding existing lock by dead process '9816' (I am process '3855')

The issue started after I tried to run a pymc3 model in the newly implemented python compiler of RStudio (there I also get this error). I tried different things like restarting both the R session and the laptop, deleting RHistory files, clearing the theano cache (I get the same error when I try to do it), creating a configuration file for theano, but none of these seemed to help.

I’m not sure this is the correct place for this question but I’m kind of desperate so I hope someone here can help me or point me to the appropriate forum.

Thanks in advance!