There are still issues with the CSP (Content Security Policy) configuration. If https://coli-conc.gbv.de/login/api is opened in Safari, it shows:
[Error] Refused to connect to wss://coli-conc.gbv.de/login/ because it appears in neither the connect-src directive nor the default-src directive of the Content Security Policy.
There are still issues with the CSP (Content Security Policy) configuration. If https://coli-conc.gbv.de/login/api is opened in Safari, it shows: