Did you modified the files over the webUI or an app, that changed something in the storage, that could be one of the reasons.
If you are sure that the files from server are correct you could run an occ files:scan --path [The path where you have the problem] but that will remove all the server checksums and will be downloaded to the client (this is only a workaround but not solves the problem).
Additionally: the first error you have listed in the picture, means the file you have in the client has a different structure but with the same name, example: File.txt and file.txt (Microsoft does not handle that problem correctly)