Welcome to the forum @habakuk25
What OS/hardware are you using please?
What do these commands show when run from your .node-red folder (the folder is important).
npm list node-red-contrib-generic-ble-arcom
npm list -g node-red-contrib-generic-ble-arcom
Also In a terminal stop node-red and start it again and post the full output here. When posting the log (or flows and code) it is important to paste it here correctly, please see this post for more details - How to share code or flow json
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