version control with RCS with LyX 2.3.3 on a mac with nextcloud-folders

[Robert Neumann]

Hello,
I am using Lyx 2.3.3 on a Mac with OS 10.13 and a Nextcloud-folder
I installed RCS, and as long as I use it, the version controll works fine. As soon as I acces the file from another Computer it does not work properly anymore. I get this message:

Bei der Ausführung des Befehls /while executing
'co -p1.1 "Rundbrief_3_2021.lyx" > "/var/folders/fk/c_b11rp52kzddr83ky_w8d7m0000gn/T/lyx_tmpdir.jTeYDZU10377/lyxvcrev_1.1_.V10377"' ist ein Fehler aufgetreten.  / there was an error

and when I try to check in the changes:

Bei der Ausführung des Befehls / while executing
'ci -q -u -m"(keine Protokollmeldung)“ „test.lyx"' ist ein Fehler aufgetreten. / there was an error

So this seems to my, that the version control accesses some tmp-file which – of course – is not available on the other computer. I am not sure, if it might be a good idea, to change the tmp-path to the nextcloud. Especially since the local paths are different. 
Thanks!