[solved] API 500 Error on /remote/ and Soap Error: Internal Server Error on Roundcube

i've setup roundcube and installed the ispconfig plugins on latest debian with latest ispconfig.
when i try one of the plugins in roundcube i get a Soap Error: Internal Server Error.
ofcorse i've setup all the configs and followed the tutorial and setup the remote user

So i tried to open the url in the browser and get a 500 error when calling
https://ispc.xxxxx.de:6622/remote/
or
https://ispc.xxxxx.de:6622/remote/index.php

When i open https://ispc.xxxxx.de:6622/remote/json.php?client_get i get

Code:

code    "invalid_data"
message    "The JSON data sent to the api is invalid"
response    false

at least a response. My IspConfig interface is also available under https://ispc.xxxxx.de:6622 i've protected it with a let's encrypt cert. 6622 is my custom port.

why i can't access the remote api? is there anything special i need to do?

 

ahh, Thanks Till you saved me again. I've checked if php7.0-soap is installed but not php-soap. after adding php-soap my setup works great.

 

There is tutorial on this, https://www.howtoforge.com/tutorial/ispconfig-3-roundcube-plugins-on-debian-stretch/
Looks like it should be made easier to find.