The Shelly integration can no longer be loaded as it is missing a requirement (paho-mqtt) - that in turn can not be updated due to a conflict:
Unable to install package paho-mqtt==1.5.1:
ERROR: Cannot install paho-mqtt==1.5.1 because these package versions have conflicting dependencies.
ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts
The recommendation seems pretty useless as I cannot call python or pip from the terminal within HA …
Restarting does not work anymore either as it complains about an invalid configuration.
As I have no idea which that might be - and the error message is rather vague in that respect - I’d hope for some suggestion to pinpoint the issue to have at least a starting point for trying to fix it …
I have the rare pleasure of actually being able to solve this problem.
I tried directly modify the custom_components/shelly/manifest.json’s mention of the mqtt version directly to 1.6.12 which kinda worked but still had problems.
Then - I noticed my Shelly version was .2 versions behind AND that the integration wasn’t flagged for an update - I manually updated it to the most recent 3.5 shelly and now it works.