No write permission to modify remote files

[poluekt102]

Hello,

After mounting the remote location I'm able to list, read and create files, but modifying the existing file fails on saving the changes.
("chmod 777" applied to remote files has no effect)

Similar issues were reported for winfsp/sshfs-win few years ago, but neither of the workarounds worked for me.
(I admit, have no knowledge/experience in these topics and could misunderstand the recipes)

Is there some recent update/hint/BKP to solve the problem?..

Thank you in advance!