Homematic binding -1 failure message

Hello everyone,

In the documentation of the Homematic binding at section “Troubleshooting” (https://www.openhab.org/addons/bindings/homematic/#troubleshooting) are two workarounds for -1 Failure mentioned. Does anybody know the two workarounds? I am faced with this issue for quite a while with my Keymatic device when executing a rule for changing the status.

Error message in the openhab.log file:

2020-11-21 20:15:02.404 [ERROR] [ternal.handler.HomematicThingHandler] - -1 Failure (sending <?xml version="1.0" encoding="ISO-8859-1"?>
<methodCall><methodName>setValue</methodName>
<params><param><value>HM_DEVICE_ID:1</value></param><param><value>STATE</value></param><param><value><boolean>0</boolean></value></param></params></methodCall>)
org.openhab.binding.homematic.internal.communicator.client.UnknownRpcFailureException: -1 Failure (sending <?xml version="1.0" encoding="ISO-8859-1"?>
<methodCall><methodName>setValue</methodName>
<params><param><value>HM_DEVICE_ID:1</value></param><param><value>STATE</value></param><param><value><boolean>0</boolean></value></param></params></methodCall>)

I am using openhab 2.5.10 with Homematic CCU.

Thanks in advance for your comments.