Similar thing is happening for me. Owner of java version for many years. Old (win 7/8) launcher works fine, but new version cannot to minecraft services and thus does not recognise me as a valid customer. Have tried disabling firewalls, but error still occurs. I have ony one Microsoft account.
Support personelle have told me that there are known bugs in the new microsoft launcher, and to use the old launcher in the meantime.
There appear to be MANY duplicates of this error reported in different ways thoughout this project, some dating back to 2 November 2021: e.g. MCL-19984. I cannot find one that that has been assigned. Numerous support messages are blaming people for not logging on with the correct microsoft account, but this ignores the appearance of the error message.
Similar thing is happening for me. Owner of java version for many years. Old (win 7/8) launcher works fine, but new version cannot to minecraft services and thus does not recognise me as a valid customer. Have tried disabling firewalls, but error still occurs. I have ony one Microsoft account.
Support personelle have told me that there are known bugs in the new microsoft launcher, and to use the old launcher in the meantime.
There appear to be MANY duplicates of this error reported in different ways thoughout this project, some dating back to 2 November 2021: e.g. MCL-19984. I cannot find one that that has been assigned. Numerous support messages are blaming people for not logging on with the correct microsoft account, but this ignores the appearance of the error message.