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Sorry to hear you’re facing problems 
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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Some useful links to gather information about your Nextcloud Talk installation:
Information about Signaling server: /index.php/index.php/settings/admin/talk#signaling_server
Information about TURN server: /index.php/settings/admin/talk#turn_server
Information about STUN server: /index.php/settings/admin/talk#stun_server
Nextcloud version (eg, 24.0.1): Nextcloud Hub 6 (27.1.4)
Talk Server version (eg, 14.0.2): 17.1.3
Custom Signaling server configured: no
Custom TURN server configured: no
Custom STUN server configured: no
In case the web version of Nextcloud Talk is involved:
Operating system (eg, Windows/Ubuntu/…): Ubuntu 22.04.1 LTS
Browser name and version (eg, Chrome v101): brave 160
In case mobile Nextcloud Talk apps are involved: no
Talk iOS version (eg, 14.0.2): x
Talk Android version (eg, 14.0.2): x
The issue you are facing:
i can react emoji with API in python. I try to react to a message with 
wich is translated in ’ ^=^q^m’
Is this the first time you’ve seen this error? (Y/N):y
Steps to replicate it:
from nc_py_api import *
nc = Nextcloud(nextcloud_url=“https://192.168.x.x”, npa_nc_cert=False, nc_auth_user=“xxx”>
conv_bot_test = “xxxxxx”
message = “”
msg_react = nc.talk.get_message_reactions(message=153, conversation=conv_bot_test)
print(msg_react) # ’ ^=^q^m’
nc.talk.react_to_message(153, ’ ^=^q^m’, conv_bot_test)
The output of your Nextcloud log in Admin > Logging or errors in nextcloud.log in /var/www/:
x
The output of your Apache/nginx/system log in /var/log/____:
x
Your browser log if relevant (python output):
Traceback (most recent call last):
File "/home/xxx/bots/testbot/test.py", line 9, in <module>
nc.talk.react_to_message(153, ":)", conv_bot_test)
File "/home/xxx/.local/lib/python3.11/site-packages/nc_py_api/_talk_api.py", line 343, in react_to_message
r = self._session.ocs("POST", self._ep_base + f"/api/v1/reaction/{token}/{message_id}", params=params)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/xxx/.local/lib/python3.11/site-packages/nc_py_api/_session.py", line 216, in ocs
return self._ocs(method, f"{quote(path)}?{urlencode(params, True)}", headers, data=data_bytes, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/xxx/.local/lib/python3.11/site-packages/nc_py_api/_session.py", line 236, in _ocs
check_error(response.status_code, info)
File "/home/xxx/.local/lib/python3.11/site-packages/nc_py_api/_exceptions.py", line 62, in check_error
raise NextcloudException(code, reason=codes(code).phrase, info=info)
nc_py_api._exceptions.NextcloudException: [400] Bad Request <request: method=POST, url=https://192.168.1.x.x/ocs/v2.php/apps/spreed/api/v1/reaction/xxx/153?reaction=%3A%29&format=json>