LastPass integration: "Other error"

I am evaluating RDM for use in my company, and so far I am very happy with it.

Unfortunately integrating RDM with LastPass (integrated mode) does not seem to work with my LP Premium account with Yubikey-authentication.
When i enter my username and password in RDM and try to get my creds list it does ask for my password and OTP and then responds:
"Other error"
The credentials list is not displayed, so i cannot use LP-integration.

What i tried already to solve the problem:
- Disabled Yubikey authentication
- I had my LP organised in two profiles. I removed those profiles, so that there is only one general profile.
- Created a seperate LP standard account

When i use a new, empty, LP standard account it does work fine, so it seems there is something in my specific account that triggers the "Other error".
Obviously it is however not possible for me to start over with a new LP account, since my own LP account contains a lot of entries and has the Premium-subscription attached to it...