Invalid parameters for command "mkdir"

[wuestkamp]

"helios-ag/fm-elfinder-bundle": "7.*", # versions 5,6,7 same error
"helios-ag/fm-elfinder-php-connector": "2.5.9"

When uploading a directory containing multiple files. The issue has been notices here too:
helios-ag/FMElfinderBundle#288

Query Parameters:

mode:
cmd:mkdir
target:l1_Lw
dirs[]:/pictures
_:1524498414013

It seems like the query parameters are missing the required parameter "name".

Any ideas for fix or workaround?

Thanks,
Kim