You removing my comment (which was an answer to your question why I did install the snap and my UX with Solus) without a word to me, not even answering my question (why it is confusingly named)?
I am currently really disappointed with your project culture here.
If you deem my comment off-topic than so is your last one.

Same error on fresh Solus 4 install. After installing the KeepassXC snap it works, after a reboot not anymore.