Ssl3_get_record:wrong version number issue with andorid / windows

Since some time I discover an odd problem.
Whenever I’m uploading a file into my Nextcloud from an andorid device (tried with several android devices in the family) I’m unable to sync that particular file with my Windows 10 client.
I’ll always get the error message: Ssl3_get_record:wrong version number

Does anyone have a clue what might be the reason?

Thank’s!