Fatal Error bridging with SMF 2.1.3 and Coppermine 1.6

[sierr014_st]

Trying to bridge a new installation of cpg 1.6.20 to SMF 2.1.3 (release version)  I'm receiving the following error at the end of process. 

Bridging doesn't work after this.

Fatal error: Uncaught Error: Undefined constant "radio" in /webroot/s/i/sierr014/st-riders.net/www/coppermine/bridgemgr.php:654 Stack trace: #0 {main} thrown in /webroot/s/i/sierr014/st-riders.net/www/coppermine/bridgemgr.php on line 654

Thanks in advance for any advice.

[ron4mac]

Update your CPG gallery to version 1.6.21

<your gallery url>/updater.php