Maildisclaimer run join scripts error

Today I installed Maildisclaimer App on my Univention Mail Server (DC Slave 4.2.1 errata 144).
After the installation I had a notification saying that Not all installed components have been registered. Please visit the "Domain… Not all installed components have been registered. Please visit the “Domain join” module to register the remaining components.
I checked “Domain join” module and I saw 35univention-maildisclaimer PENDING so I decided to execute all pending join scripts.

The result was not successful and logs show this error:

Waiting for activation of the extension object maildisclaimer/images:…ERROR: Master did not mark the extension object active within 180 seconds.
ERROR
ucs_registerLDAPExtension: registraton of /usr/share/maildisclaimer/udm/images.py failed.
EXITCODE=1

mer 23 ago 2017, 17.38.49, CEST
univention-run-join-scripts finished

Could someone help me? Thanks.

Good afternoon Mician,
repeat the process again i.e run the join scripts -> 35univention-maildisclaimer, (forcefully). Also take a look at the join.log result on the DC Slave

tail /var/log/join.log 
tail /var/log/univention/listerner.log

Here you will find some useful information

My Regards
Anna.

Thanks Anna, finally I solved this problem after a reboot of both the DC master server and DC backup server.
After that I run the join scripts again and now everything works.

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