Enabling collabora fills the log with errors

Enabling the collabora v3.2.0 on NC15 fills the log with the following errors on every file operation:

fclose(): supplied resource is not a valid stream resource at /var/www/nextcloud/apps/files_external/3rdparty/icewind/streams/src/Wrapper.php#132

_StreamDecorator::_toString exception: RuntimeException: Unable to seek to stream position 0 with whence 0 in /var/www/nextcloud/3rdparty/guzzlehttp/psr7/src/Stream.php:200 Stack trace: #0

These errors appear on every file operation, not only on opening office files. Apart from these errors, collabora is working flawlessly, can open/edit/save all files.

Found a “solution”
After installing php-smbclient , the above errors don’t appear anymore, but sometimes, there is a new error in the log:
smbclient_state_errno(): supplied resource is not a valid smbclient state resource at /var/www/nextcloud/apps/files_external/3rdparty/icewind/smb/src/Native/NativeState.php#57