db2 backup fails after 12.1.1.0-cn1 upgrade

Condition

After you upgrade to 12.1.1.0-cn1 with enableBackupCompression set to YES, db2 backup fails with the following error:
SQL2071N  An error occurred while accessing the shared library
"/opt/ibm/db2/V11.5.0.0/lib64/libdb2compr_encr.so.1". Reason code: "1".

Workaround

Set the ENCRLIB database configuration parameter to the correct path.