Which version of openLCA are you using and do you have access to the collaboration server yourself (to access the logfile, after this error occurs)? As a workaround, you can download the repository from the web interface of the collaboration server via the JSON-LD export and import into openLCA with the JSON-LD import, and afterwards connect to the repository and fetch (this should recognize, that you already have all the data in your local database, and bring you up-to-date).