Exception: Cannot load configuration file /opt/interconnect/etc/qdrouterd.conf: Expecting property name enclosed in double quotes

Issue

The following error can be observed in qdrouterd log file after upgrade from version 1.7 to version 1.10.6:

2022-03-10 12:57:07.035927 +0000 ERROR (error) Python: Exception: Cannot load configuration file /opt/interconnect/etc/qdrouterd.conf: Expecting property name enclosed in double quotes: line 88 column 1 (char 2165)
2022-03-10 12:57:07.036272 +0000 ERROR (error) Traceback (most recent call last):
  File "/usr/lib/qpid-dispatch/python/qpid_dispatch_internal/management/config.py", line 279, in configure_dispatch
    config = Config(filename)
  File "/usr/lib/qpid-dispatch/python/qpid_dispatch_internal/management/config.py", line 64, in __init__
    % (filename, e))
Exception: Cannot load configuration file /opt/interconnect/etc/qdrouterd.conf: Expecting property name enclosed in double quotes: line 88 column 1 (char 2165)

2022-03-10 12:57:07.036293 +0000 MAIN (critical) Router start-up failed: Python: Exception: Cannot load configuration file /opt/interconnect/etc/qdrouterd.conf: Expecting property name enclosed in double quotes: line 88 column 1 (char 2165)
qdrouterd: Python: Exception: Cannot load configuration file /opt/interconnect/etc/qdrouterd.conf: Expecting property name enclosed in double quotes: line 88 column 1 (char 2165)